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Nacrita - Viquipèdia, l'enciclopèdia lliure
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href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_ca.wikipedia.org&uselang=ca"><span>Donatius</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Especial:Crea_compte&returnto=Nacrita" title="Us animem a crear un compte i iniciar una sessió, encara que no és obligatori"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Crea un compte</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Especial:Registre_i_entrada&returnto=Nacrita" title="Us animem a registrar-vos, però no és obligatori [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Inicia la sessió</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pàgines per a editors no registrats <a href="/wiki/Ajuda:Introducci%C3%B3" aria-label="Vegeu més informació sobre l'edició"><span>més informació</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Especial:Contribucions_pr%C3%B2pies" title="Una llista de les modificacions fetes des d'aquesta adreça IP [y]" accesskey="y"><span>Contribucions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Especial:Discussi%C3%B3_personal" title="Discussió sobre les edicions per aquesta adreça ip. [n]" accesskey="n"><span>Discussió per aquest IP</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"><!-- CentralNotice --></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Lloc"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contingut" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contingut</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">amaga</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inici</div> </a> </li> <li id="toc-Classificació" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Classificació"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Classificació</span> </div> </a> <ul id="toc-Classificació-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Formació_i_jaciments" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Formació_i_jaciments"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Formació i jaciments</span> </div> </a> <ul id="toc-Formació_i_jaciments-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Enllaços_externs" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Enllaços_externs"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Enllaços externs</span> </div> </a> <ul id="toc-Enllaços_externs-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referències" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referències"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Referències</span> </div> </a> <ul id="toc-Referències-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contingut" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Commuta la taula de continguts." > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Commuta la taula de continguts.</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Nacrita</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vés a un article en una altra llengua. Disponible en 13 llengües" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-13" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">13 llengües</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Nakrit" title="Nakrit - alemany" lang="de" hreflang="de" data-title="Nakrit" data-language-autonym="Deutsch" data-language-local-name="alemany" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Nacrite" title="Nacrite - anglès" lang="en" hreflang="en" data-title="Nacrite" data-language-autonym="English" data-language-local-name="anglès" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Nacrita" title="Nacrita - espanyol" lang="es" hreflang="es" data-title="Nacrita" data-language-autonym="Español" data-language-local-name="espanyol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Nacrita" title="Nacrita - basc" lang="eu" hreflang="eu" data-title="Nacrita" data-language-autonym="Euskara" data-language-local-name="basc" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%86%D8%A7%DA%A9%D8%B1%DB%8C%D8%AA" title="ناکریت - persa" lang="fa" hreflang="fa" data-title="ناکریت" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Nacrite" title="Nacrite - francès" lang="fr" hreflang="fr" data-title="Nacrite" data-language-autonym="Français" data-language-local-name="francès" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Nacrite" title="Nacrite - italià" lang="it" hreflang="it" data-title="Nacrite" data-language-autonym="Italiano" data-language-local-name="italià" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%8A%E3%82%AF%E3%83%AB%E7%9F%B3" title="ナクル石 - japonès" lang="ja" hreflang="ja" data-title="ナクル石" data-language-autonym="日本語" data-language-local-name="japonès" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Nacriet" title="Nacriet - neerlandès" lang="nl" hreflang="nl" data-title="Nacriet" data-language-autonym="Nederlands" data-language-local-name="neerlandès" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Nakryt" title="Nakryt - polonès" lang="pl" hreflang="pl" data-title="Nakryt" data-language-autonym="Polski" data-language-local-name="polonès" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%A8%E0%AE%BE%E0%AE%95%E0%AF%8D%E0%AE%B0%E0%AF%88%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AF%81" title="நாக்ரைட்டு - tàmil" lang="ta" hreflang="ta" data-title="நாக்ரைட்டு" data-language-autonym="தமிழ்" data-language-local-name="tàmil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9D%D0%B0%D0%BA%D1%80%D0%B8%D1%82" title="Накрит - ucraïnès" lang="uk" hreflang="uk" data-title="Накрит" data-language-autonym="Українська" data-language-local-name="ucraïnès" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%8F%8D%E7%8F%A0%E7%9F%B3" title="珍珠石 - xinès" lang="zh" hreflang="zh" data-title="珍珠石" data-language-autonym="中文" data-language-local-name="xinès" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q418903#sitelinks-wikipedia" title="Modifica enllaços interlingües" class="wbc-editpage">Modifica els enllaços</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Espais de noms"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Nacrita" title="Vegeu el contingut de la pàgina [c]" accesskey="c"><span>Pàgina</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Discussi%C3%B3:Nacrita&action=edit&redlink=1" rel="discussion" class="new" title="Discussió sobre el contingut d'aquesta pàgina (encara no existeix) [t]" accesskey="t"><span>Discussió</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Canvia la variant de llengua" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">català</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Vistes"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Nacrita"><span>Mostra</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Nacrita&action=edit" title="Modifica el codi font d'aquesta pàgina [e]" accesskey="e"><span>Modifica</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Nacrita&action=history" title="Versions antigues d'aquesta pàgina [h]" accesskey="h"><span>Mostra l'historial</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Eines de la pàgina"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Eines" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Eines</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Eines</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">amaga</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Més opcions" > <div class="vector-menu-heading"> Accions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Nacrita"><span>Mostra</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Nacrita&action=edit" title="Modifica el codi font d'aquesta pàgina [e]" accesskey="e"><span>Modifica</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Nacrita&action=history"><span>Mostra l'historial</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Especial:Enlla%C3%A7os/Nacrita" title="Una llista de totes les pàgines wiki que enllacen amb aquesta [j]" accesskey="j"><span>Què hi enllaça</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Especial:Seguiment/Nacrita" rel="nofollow" title="Canvis recents a pàgines enllaçades des d'aquesta pàgina [k]" accesskey="k"><span>Canvis relacionats</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Especial:P%C3%A0gines_especials" title="Llista totes les pàgines especials [q]" accesskey="q"><span>Pàgines especials</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Nacrita&oldid=32792726" title="Enllaç permanent a aquesta revisió de la pàgina"><span>Enllaç permanent</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Nacrita&action=info" title="Més informació sobre aquesta pàgina"><span>Informació de la pàgina</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Especial:Citau&page=Nacrita&id=32792726&wpFormIdentifier=titleform" title="Informació sobre com citar aquesta pàgina"><span>Citau aquest article</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Especial:UrlShortener&url=https%3A%2F%2Fca.wikipedia.org%2Fwiki%2FNacrita"><span>Obtén una URL abreujada</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Especial:QrCode&url=https%3A%2F%2Fca.wikipedia.org%2Fwiki%2FNacrita"><span>Descarrega el codi QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Imprimeix/exporta </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Especial:Llibre&bookcmd=book_creator&referer=Nacrita"><span>Crea un llibre</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Especial:DownloadAsPdf&page=Nacrita&action=show-download-screen"><span>Baixa com a PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Nacrita&printable=yes" title="Versió per a impressió d'aquesta pàgina [p]" accesskey="p"><span>Versió per a impressora</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> En altres projectes </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:Nacrite" hreflang="en"><span>Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q418903" title="Enllaç a l'element del repositori de dades connectat [g]" accesskey="g"><span>Element a Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Eines de la pàgina"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aparença"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Aparença</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">amaga</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">De la Viquipèdia, l'enciclopèdia lliure</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="ca" dir="ltr"><table class="infobox" style="font-size:90%;width:25em;font-size:90%;"><tbody><tr><th colspan="2" style="text-align:center;font-size:125%;font-weight:bold;background-color:#b0d1ad;"><span style="float:left; margin-left: 3px;"><span typeof="mw:File"><a href="/wiki/Fitxer:Linecons_diamond.svg" class="mw-file-description" title="Infotaula de mineral"><img alt="Infotaula de mineral" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/52/Linecons_diamond.svg/25px-Linecons_diamond.svg.png" decoding="async" width="25" height="25" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/52/Linecons_diamond.svg/38px-Linecons_diamond.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/52/Linecons_diamond.svg/50px-Linecons_diamond.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span></span>Nacrita</th></tr><tr><td colspan="2" class="infobox-full-data infobox-data" style="text-align:center"><span typeof="mw:File"><a href="/wiki/Fitxer:Nacrite_-_Mineralogisches_Museum_Bonn1.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c4/Nacrite_-_Mineralogisches_Museum_Bonn1.jpg/300px-Nacrite_-_Mineralogisches_Museum_Bonn1.jpg" decoding="async" width="300" height="279" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c4/Nacrite_-_Mineralogisches_Museum_Bonn1.jpg/450px-Nacrite_-_Mineralogisches_Museum_Bonn1.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c4/Nacrite_-_Mineralogisches_Museum_Bonn1.jpg/600px-Nacrite_-_Mineralogisches_Museum_Bonn1.jpg 2x" data-file-width="2888" data-file-height="2687" /></a></span><br /><small> <span class="penicon"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q418903?uselang=ca#P18" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></small></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;"><a href="/wiki/F%C3%B3rmula_qu%C3%ADmica" title="Fórmula química">Fórmula química</a></th><td class="infobox-data" style="width:60%; font-size:90%;">Al₄[(OH)₈] Si₄O<sub>10</sub>]</td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;"><a href="/wiki/Ep%C3%B2nim" title="Epònim">Epònim</a></th><td class="infobox-data" style="width:60%; font-size:90%;"><a href="/wiki/Nacre" title="Nacre">nacre</a> <span class="penicon"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q418903?uselang=ca#P138" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;"><a href="/wiki/Localitat_tipus_(geologia)" class="mw-redirect" title="Localitat tipus (geologia)">Localitat tipus</a></th><td class="infobox-data" style="width:60%; font-size:90%;"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q71159" class="extiw" title="d:Special:EntityPage/Q71159">Brand-Erbisdorf</a> <span class="penicon"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q418903?uselang=ca#P2695" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr><tr><th colspan="2" class="infobox-header" style="text-align:center;background-color:#b0d1ad;">Classificació</th></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;">Categoria</th><td class="infobox-data" style="width:60%; font-size:90%;"><a href="/wiki/Minerals_silicats" title="Minerals silicats">silicats</a> > <a href="/wiki/Fil%C2%B7losilicat" title="Fil·losilicat">fil·losilicats</a></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;"><a href="/wiki/Classificaci%C3%B3_de_Nickel-Strunz" title="Classificació de Nickel-Strunz">Nickel-Strunz 10a ed.</a></th><td class="infobox-data" style="width:60%; font-size:90%;">9.ED.05 <span class="penicon" data-bridge-edit-flow="single-best-value"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q418903?uselang=ca#P713" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;">Nickel-Strunz 9a ed.</th><td class="infobox-data" style="width:60%; font-size:90%;">9.ED.05 <span class="penicon" data-bridge-edit-flow="single-best-value"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q418903?uselang=ca#P712" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;">Nickel-Strunz 8a ed.</th><td class="infobox-data" style="width:60%; font-size:90%;">VIII/E.10a <span class="penicon" data-bridge-edit-flow="single-best-value"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q418903?uselang=ca#P711" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr><tr><th colspan="2" class="infobox-header" style="text-align:center;background-color:#b0d1ad;">Propietats</th></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;"><a href="/wiki/Sistema_cristal%C2%B7l%C3%AD" title="Sistema cristal·lí">Sistema cristal·lí</a></th><td class="infobox-data" style="width:60%; font-size:90%;"><a href="/wiki/Monocl%C3%ADnic" class="mw-redirect" title="Monoclínic">monoclínic</a></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;">Color</th><td class="infobox-data" style="width:60%; font-size:90%;">blanc, gris blanquinós, groc</td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;"><a href="/wiki/Exfoliaci%C3%B3_(mineralogia)" title="Exfoliació (mineralogia)">Exfoliació</a></th><td class="infobox-data" style="width:60%; font-size:90%;">{001} perfecta</td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;"><a href="/wiki/Duresa_Mohs" class="mw-redirect" title="Duresa Mohs">Duresa</a></th><td class="infobox-data" style="width:60%; font-size:90%;">1</td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;"><a href="/wiki/Llu%C3%AFssor" title="Lluïssor">Lluïssor</a></th><td class="infobox-data" style="width:60%; font-size:90%;">nacrada</td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;">Color de la <a href="/wiki/Ratlla_(mineralogia)" title="Ratlla (mineralogia)">ratlla</a></th><td class="infobox-data" style="width:60%; font-size:90%;">blanca</td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;"><a href="/wiki/Densitat" title="Densitat">Densitat</a></th><td class="infobox-data" style="width:60%; font-size:90%;">2,6</td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;"><a href="/wiki/Estatus_IMA" title="Estatus IMA">Estatus IMA</a></th><td class="infobox-data" style="width:60%; font-size:90%;"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q13406846" class="extiw" title="d:Special:EntityPage/Q13406846">mineral heretat (G)</a> <span class="penicon"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q418903?uselang=ca#P579" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;width:40%; padding:0.1em; background:#eeeeee; font-size:90%;"><a href="/wiki/S%C3%ADmbol_mineral" title="Símbol mineral">Símbol</a></th><td class="infobox-data" style="width:60%; font-size:90%;">Ncr <span class="penicon" data-bridge-edit-flow="single-best-value"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q418903?uselang=ca#P10113" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr></tbody></table> <p>La <b>nacrita</b> (del persa <i>nakar</i>, <a href="/wiki/Nacre" title="Nacre">nacre</a>) és un <a href="/wiki/Mineral" title="Mineral">mineral</a> que apareix en petits cristalls o fines escates. El seu nom prové del <a href="/wiki/Franc%C3%A8s" title="Francès">francès</a> Nacre (mare de <a href="/wiki/Perla" title="Perla">perles</a>), el al·lusió a la seva <a href="/wiki/Llu%C3%AFssor" title="Lluïssor">lluïssor</a>. És un membre del <a href="/w/index.php?title=Grup_de_la_caolinita-serpentina&action=edit&redlink=1" class="new" title="Grup de la caolinita-serpentina (encara no existeix)">grup de la caolinita-serpentina</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Classificació"><span id="Classificaci.C3.B3"></span>Classificació</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nacrita&action=edit&section=1" title="Modifica la secció: Classificació"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Segons la <a href="/wiki/Classificaci%C3%B3_de_Nickel-Strunz" title="Classificació de Nickel-Strunz">classificació de Nickel-Strunz</a>, la nacrita pertany a «09.ED: Fil·losilicats amb capes de caolinita, compostos per xarxes tetraèdriques i octaèdriques» juntament amb els següents minerals: <a href="/wiki/Dickita" title="Dickita">dickita</a>, <a href="/wiki/Caolinita" title="Caolinita">caolinita</a>, odinita, <a href="/wiki/Hal%C2%B7loysita" title="Hal·loysita">hal·loysita</a>, hisingerita, <a href="/wiki/Hal%C2%B7loysita-7%C3%85" class="mw-redirect" title="Hal·loysita-7Å">hal·loysita-7Å</a>, amesita, <a href="/wiki/Antigorita" title="Antigorita">antigorita</a>, berthierina, brindleyita, caryopilita, <a href="/wiki/Cris%C3%B2til" title="Crisòtil">crisòtil</a>, cronstedtita, fraipontita, greenalita, kellyita, lizardita, manandonita, nepouita, pecoraita, guidottiita, <a href="/wiki/Al%C2%B7l%C3%B2fana" title="Al·lòfana">al·lòfana</a>, <a href="/wiki/Crisocol%C2%B7la" title="Crisocol·la">crisocol·la</a>, imogolita, neotocita, bismutoferrita i <a href="/wiki/Chapmanita" title="Chapmanita">chapmanita</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Formació_i_jaciments"><span id="Formaci.C3.B3_i_jaciments"></span>Formació i jaciments</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nacrita&action=edit&section=2" title="Modifica la secció: Formació i jaciments"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La nacrita s'ha descrit a tots els continents exeptuant l'Antàrtida. L'ambient de formació és el mateix en el que es formen <a href="/wiki/Caolinita" title="Caolinita">caolinita</a> o <a href="/wiki/Dickita" title="Dickita">dickita</a>. És d'origen hidrotermal. A Catalunya s'ha descrit a les mines Regia i Regia antiga de Bellmunt del Priorat i a la mina Linda Mariquita del Molar.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Enllaços_externs"><span id="Enlla.C3.A7os_externs"></span>Enllaços externs</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nacrita&action=edit&section=3" title="Modifica la secció: Enllaços externs"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r33663753">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:#f9f9f9;display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}.mw-parser-output .side-box-center{clear:both;margin:auto}}</style><div class="side-box metadata side-box-right plainlinks"> <div class="side-box-flex"> <div class="side-box-image"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png" decoding="async" width="30" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/45px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/59px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span></div> <div class="side-box-text plainlist">A <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/P%C3%A0gina_principal?uselang=ca">Wikimedia Commons</a></span> hi ha contingut multimèdia relatiu a: <i><b><a href="https://commons.wikimedia.org/wiki/Category:Nacrite" class="extiw" title="commons:Category:Nacrite">Nacrita</a></b></i></div></div> </div> <ul><li><a rel="nofollow" class="external free" href="http://www.mindat.org/min-2826.html">http://www.mindat.org/min-2826.html</a></li> <li><a rel="nofollow" class="external free" href="http://www.webmineral.com/data/Nacrite.shtml">http://www.webmineral.com/data/Nacrite.shtml</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Referències"><span id="Refer.C3.A8ncies"></span>Referències</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nacrita&action=edit&section=4" title="Modifica la secció: Referències"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="reflist {{#if: | references-column-count references-column-count-{{{col}}}" style="list-style-type: decimal;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><span class="citation book" style="font-style:normal" id="CITEREFCreus2008"><span style="font-variant: small-caps;">Creus</span>, Joan Abella i. <a rel="nofollow" class="external text" href="https://books.google.cat/books/about/Minerals_i_Mines_de_la_Conca_de_Bellmunt.html?id=SQ-IbUBV_eUC"><i>Minerals i Mines de la Conca de Bellmunt Del Priorat</i></a>.  Joan Abella Creus, 2008. <span style="font-size:90%; white-space:nowrap;"><a href="/wiki/Especial:Fonts_bibliogr%C3%A0fiques/9788461213122" title="Especial:Fonts bibliogràfiques/9788461213122">ISBN 9788461213122</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Minerals+i+Mines+de+la+Conca+de+Bellmunt+Del+Priorat&rft.aulast=Creus&rft.aufirst=Joan+Abella+i&rft.date=2008&rft.pub=Joan+Abella+Creus&rft.isbn=9788461213122&rft_id=https%3A%2F%2Fbooks.google.cat%2Fbooks%2Fabout%2FMinerals_i_Mines_de_la_Conca_de_Bellmunt.html%3Fid%3DSQ-IbUBV_eUC"><span style="display: none;"> </span></span></span> </li> </ol></div></div> <div role="navigation" class="navbox" aria-label="Navbox" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Bases d'informació</th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/GEC" class="mw-redirect" title="GEC">GEC</a> <span class="uid"> (<a rel="nofollow" class="external text" href="https://www.enciclopedia.cat/gran-enciclopedia-catalana/nacrita">1</a>)</span></li></ul> </div></td></tr></tbody></table></div> <!-- NewPP limit report Parsed by mw‐web.eqiad.main‐7c479b968‐dlxml Cached time: 20241117163453 Cache expiry: 2592000 Reduced expiry: false Complications: [show‐toc] CPU time usage: 0.179 seconds Real time usage: 0.620 seconds Preprocessor visited node count: 1129/1000000 Post‐expand include size: 27173/2097152 bytes Template argument size: 1820/2097152 bytes Highest expansion depth: 12/100 Expensive parser function count: 0/500 Unstrip recursion depth: 0/20 Unstrip post‐expand size: 2338/5000000 bytes Lua time usage: 0.081/10.000 seconds Lua memory usage: 1831135/52428800 bytes Number of Wikibase entities loaded: 1/400 --> <!-- Transclusion expansion time report (%,ms,calls,template) 100.00% 226.039 1 -total 69.05% 156.073 1 Plantilla:Infotaula_mineral 67.24% 151.981 1 Plantilla:Infotaula 14.77% 33.387 1 Plantilla:Commonscat 12.33% 27.862 1 Plantilla:Sister 11.48% 25.946 1 Plantilla:Caixa_lateral 10.67% 24.115 1 Plantilla:If_then_show 8.23% 18.609 1 Plantilla:Referències 7.14% 16.128 1 Plantilla:Autoritat 5.86% 13.250 2 Plantilla:Colors_infotaules --> <!-- Saved in parser cache with key cawiki:pcache:idhash:78393-0!canonical and timestamp 20241117163453 and revision id 32792726. 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