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Exfoliació (mineralogia) - Viquipèdia, l'enciclopèdia lliure

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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> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Exfoliació (mineralogia)</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 45 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-45" 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">45 llengües</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A7%D9%86%D9%81%D8%B5%D8%A7%D9%85_%D8%A8%D9%84%D9%88%D8%B1%D9%8A" title="انفصام بلوري - àrab" lang="ar" hreflang="ar" data-title="انفصام بلوري" data-language-autonym="العربية" data-language-local-name="àrab" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A1%D0%BF%D0%B0%D0%B9%D0%BD%D0%B0%D1%81%D1%86%D1%8C" title="Спайнасць - belarús" lang="be" hreflang="be" data-title="Спайнасць" data-language-autonym="Беларуская" data-language-local-name="belarús" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A6%D0%B5%D0%BF%D0%B8%D1%82%D0%B5%D0%BB%D0%BD%D0%BE%D1%81%D1%82" title="Цепителност - búlgar" lang="bg" hreflang="bg" data-title="Цепителност" data-language-autonym="Български" data-language-local-name="búlgar" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Kalavost_(kristal)" title="Kalavost (kristal) - bosnià" lang="bs" hreflang="bs" data-title="Kalavost (kristal)" data-language-autonym="Bosanski" data-language-local-name="bosnià" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/%C5%A0t%C4%9Bpnost" title="Štěpnost - txec" lang="cs" hreflang="cs" data-title="Štěpnost" data-language-autonym="Čeština" data-language-local-name="txec" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Spaltbarkeit" title="Spaltbarkeit - alemany" lang="de" hreflang="de" data-title="Spaltbarkeit" 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/Cleavage_(crystal)" title="Cleavage (crystal) - anglès" lang="en" hreflang="en" data-title="Cleavage (crystal)" data-language-autonym="English" data-language-local-name="anglès" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Klivebleco" title="Klivebleco - esperanto" lang="eo" hreflang="eo" data-title="Klivebleco" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Exfoliaci%C3%B3n_(mineralog%C3%ADa)" title="Exfoliación (mineralogía) - espanyol" lang="es" hreflang="es" data-title="Exfoliación (mineralogía)" data-language-autonym="Español" data-language-local-name="espanyol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/L%C3%B5henevus" title="Lõhenevus - estonià" lang="et" hreflang="et" data-title="Lõhenevus" data-language-autonym="Eesti" data-language-local-name="estonià" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Esfoliazio_(mineralogia)" title="Esfoliazio (mineralogia) - basc" lang="eu" hreflang="eu" data-title="Esfoliazio (mineralogia)" 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/%D8%B1%D8%AE_(%DA%A9%D8%A7%D9%86%DB%8C%E2%80%8C%D8%B4%D9%86%D8%A7%D8%B3%DB%8C)" title="رخ (کانی‌شناسی) - persa" lang="fa" hreflang="fa" data-title="رخ (کانی‌شناسی)" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Lohkeavuus" title="Lohkeavuus - finès" lang="fi" hreflang="fi" data-title="Lohkeavuus" data-language-autonym="Suomi" data-language-local-name="finès" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Clivage" title="Clivage - francès" lang="fr" hreflang="fr" data-title="Clivage" data-language-autonym="Français" data-language-local-name="francès" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Exfoliaci%C3%B3n_(mineralox%C3%ADa)" title="Exfoliación (mineraloxía) - gallec" lang="gl" hreflang="gl" data-title="Exfoliación (mineraloxía)" data-language-autonym="Galego" data-language-local-name="gallec" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A4%D7%A6%D7%99%D7%9C%D7%95%D7%AA" title="פצילות - hebreu" lang="he" hreflang="he" data-title="פצילות" data-language-autonym="עברית" data-language-local-name="hebreu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B5%E0%A4%BF%E0%A4%A6%E0%A4%B2%E0%A4%A8_(%E0%A4%95%E0%A5%8D%E0%A4%B0%E0%A4%BF%E0%A4%B8%E0%A5%8D%E0%A4%9F%E0%A4%B2)" title="विदलन (क्रिस्टल) - hindi" lang="hi" hreflang="hi" data-title="विदलन (क्रिस्टल)" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Kalavost" title="Kalavost - croat" lang="hr" hreflang="hr" data-title="Kalavost" data-language-autonym="Hrvatski" data-language-local-name="croat" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Klivaj" title="Klivaj - crioll d’Haití" lang="ht" hreflang="ht" data-title="Klivaj" data-language-autonym="Kreyòl ayisyen" data-language-local-name="crioll d’Haití" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Belahan_(kristal)" title="Belahan (kristal) - indonesi" lang="id" hreflang="id" data-title="Belahan (kristal)" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesi" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Klivo" title="Klivo - ido" lang="io" hreflang="io" data-title="Klivo" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Sfaldatura" title="Sfaldatura - italià" lang="it" hreflang="it" data-title="Sfaldatura" 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%81%B8%E3%81%8D%E9%96%8B" title="へき開 - japonès" lang="ja" hreflang="ja" data-title="へき開" 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-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%A2%E1%83%99%E1%83%94%E1%83%A9%E1%83%90%E1%83%93%E1%83%9D%E1%83%91%E1%83%90" title="ტკეჩადობა - georgià" lang="ka" hreflang="ka" data-title="ტკეჩადობა" data-language-autonym="ქართული" data-language-local-name="georgià" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%91%D3%A9%D0%BB%D0%B5%D0%BA%D1%82%D1%96%D0%BA" title="Бөлектік - kazakh" lang="kk" hreflang="kk" data-title="Бөлектік" data-language-autonym="Қазақша" data-language-local-name="kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%B2%BD%EA%B0%9C" title="벽개 - coreà" lang="ko" hreflang="ko" data-title="벽개" data-language-autonym="한국어" data-language-local-name="coreà" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Skalumas" title="Skalumas - lituà" lang="lt" hreflang="lt" data-title="Skalumas" data-language-autonym="Lietuvių" data-language-local-name="lituà" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Skaldn%C4%ABba" title="Skaldnība - letó" lang="lv" hreflang="lv" data-title="Skaldnība" data-language-autonym="Latviešu" data-language-local-name="letó" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Splitten_(Mineral)" title="Splitten (Mineral) - baix alemany" lang="nds" hreflang="nds" data-title="Splitten (Mineral)" data-language-autonym="Plattdüütsch" data-language-local-name="baix alemany" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Splijting_(kristal)" title="Splijting (kristal) - neerlandès" lang="nl" hreflang="nl" data-title="Splijting (kristal)" data-language-autonym="Nederlands" data-language-local-name="neerlandès" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Kl%C3%B8yv" title="Kløyv - noruec nynorsk" lang="nn" hreflang="nn" data-title="Kløyv" data-language-autonym="Norsk nynorsk" data-language-local-name="noruec nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Kl%C3%B8v_(mineralogi)" title="Kløv (mineralogi) - noruec bokmål" lang="nb" hreflang="nb" data-title="Kløv (mineralogi)" data-language-autonym="Norsk bokmål" data-language-local-name="noruec bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/%C5%81upliwo%C5%9B%C4%87" title="Łupliwość - polonès" lang="pl" hreflang="pl" data-title="Łupliwość" data-language-autonym="Polski" data-language-local-name="polonès" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Clivagem_(mineralogia)" title="Clivagem (mineralogia) - portuguès" lang="pt" hreflang="pt" data-title="Clivagem (mineralogia)" data-language-autonym="Português" data-language-local-name="portuguès" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Clivaj" title="Clivaj - romanès" lang="ro" hreflang="ro" data-title="Clivaj" data-language-autonym="Română" data-language-local-name="romanès" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A1%D0%BF%D0%B0%D0%B9%D0%BD%D0%BE%D1%81%D1%82%D1%8C" title="Спайность - rus" lang="ru" hreflang="ru" data-title="Спайность" data-language-autonym="Русский" data-language-local-name="rus" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Cleavage_(crystal)" title="Cleavage (crystal) - escocès" lang="sco" hreflang="sco" data-title="Cleavage (crystal)" data-language-autonym="Scots" data-language-local-name="escocès" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Kalavost" title="Kalavost - serbocroat" lang="sh" hreflang="sh" data-title="Kalavost" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbocroat" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Razkolnost" title="Razkolnost - eslovè" lang="sl" hreflang="sl" data-title="Razkolnost" data-language-autonym="Slovenščina" data-language-local-name="eslovè" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Spaltning" title="Spaltning - suec" lang="sv" hreflang="sv" data-title="Spaltning" data-language-autonym="Svenska" data-language-local-name="suec" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%81%E0%B8%99%E0%B8%A7%E0%B9%81%E0%B8%95%E0%B8%81%E0%B9%80%E0%B8%A3%E0%B8%B5%E0%B8%A2%E0%B8%9A" title="แนวแตกเรียบ - tai" lang="th" hreflang="th" data-title="แนวแตกเรียบ" data-language-autonym="ไทย" data-language-local-name="tai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A1%D0%BF%D0%B0%D0%B9%D0%BD%D1%96%D1%81%D1%82%D1%8C" title="Спайність - ucraïnès" lang="uk" hreflang="uk" data-title="Спайність" data-language-autonym="Українська" data-language-local-name="ucraïnès" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/C%C3%A1t_khai" title="Cát khai - vietnamita" lang="vi" hreflang="vi" data-title="Cát khai" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E8%A7%A3%E7%90%86" title="解理 - xinès" lang="zh" hreflang="zh" data-title="解理" data-language-autonym="中文" data-language-local-name="xinès" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Pit-l%C3%AD" title="Pit-lí - xinès min del sud" lang="nan" hreflang="nan" data-title="Pit-lí" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="xinès min del sud" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</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/Q107400#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/Exfoliaci%C3%B3_(mineralogia)" title="Vegeu el contingut de la pàgina [c]" accesskey="c"><span>Pàgina</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Discussi%C3%B3:Exfoliaci%C3%B3_(mineralogia)" rel="discussion" title="Discussió sobre el contingut d&#039;aquesta pàgina [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/Exfoliaci%C3%B3_(mineralogia)"><span>Mostra</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Exfoliaci%C3%B3_(mineralogia)&amp;action=edit" title="Modifica el codi font d&#039;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=Exfoliaci%C3%B3_(mineralogia)&amp;action=history" title="Versions antigues d&#039;aquesta pàgina [h]" accesskey="h"><span>Mostra l'historial</span></a></li> </ul> </div> </div> </nav> <nav 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class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Biotite_sliceUSGOV.jpg/220px-Biotite_sliceUSGOV.jpg" decoding="async" width="220" height="161" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Biotite_sliceUSGOV.jpg/330px-Biotite_sliceUSGOV.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/e/e9/Biotite_sliceUSGOV.jpg 2x" data-file-width="360" data-file-height="264" /></a><figcaption>Làmina de <a href="/wiki/Biotita" title="Biotita">biotita</a> (<a href="/wiki/Mica" title="Mica">mica</a> negra)</figcaption></figure> <p>L'<b>exfoliació</b> és la tendència d'un <a href="/wiki/Mineral" title="Mineral">mineral</a> a trencar-se per plans paral·lels, a causa de l'existència de plans amb <a href="/wiki/Enlla%C3%A7_qu%C3%ADmic" title="Enllaç químic">enllaços</a> febles. </p><p>En l'<a href="/wiki/Estructura_cristal%C2%B7lina" title="Estructura cristal·lina">estructura cristal·lina</a> dels minerals alguns enllaços són 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En alguns minerals, com la <a href="/wiki/Mica" title="Mica">mica</a> la disposició dels àtoms segueix una disposició laminar, en què cada àtom està unit amb enllaços forts als àtoms veïns del mateix pla i amb enllaços febles als àtoms propers dels plans veïns. Quan se sotmet el mineral a <a href="/wiki/Tensi%C3%B3_(mec%C3%A0nica)" title="Tensió (mecànica)">tensió</a> tendeixen a trencar-se els enllaços febles d'un mateix pla, de manera que el mineral es trenca en làmines (o en fulles, que d'aquí ve el terme exfoliació). No tots els minerals tenen plans definits d'exfoliació, però els que sí que els posseïxen poden ser identificats per les superfícies llises distintives que es produïxen quan es trenca el mineral. </p><p>El tipus més senzill d'exfoliació és de les <a href="/wiki/Mica" title="Mica">miques</a>, atès que aquestes tenen enllaços febles en una direcció i s'exfolien formant làmines planes i molt primes. </p><p>El terme també s'aplica a algunes <a href="/wiki/Roca" title="Roca">roques</a> d'estructura laminar, com la <a href="/wiki/Pissarra" class="mw-redirect" title="Pissarra">pissarra</a> que tendeixen a trencar-se seguint plans definits. </p><p><span style="display: none;" class="interProject"><a href="https://ca.wiktionary.org/wiki/exfoliaci%C3%B3" class="extiw" title="wikt:exfoliació">Viccionari</a></span> </p> <!-- NewPP limit report Parsed by mw‐web.eqiad.main‐667bbb4584‐xlnkq Cached time: 20250219155207 Cache expiry: 2592000 Reduced expiry: false Complications: [] CPU time usage: 0.016 seconds Real time usage: 0.254 seconds Preprocessor visited node count: 7/1000000 Post‐expand include size: 89/2097152 bytes Template argument size: 11/2097152 bytes Highest expansion depth: 3/100 Expensive parser function count: 0/500 Unstrip recursion depth: 0/20 Unstrip post‐expand size: 0/5000000 bytes Number of Wikibase entities loaded: 0/400 --> <!-- Transclusion expansion time report (%,ms,calls,template) 100.00% 1.526 1 Plantilla:Viccionari-lateral 100.00% 1.526 1 -total --> <!-- Saved in parser cache with key cawiki:pcache:79026:|#|:idhash:canonical and timestamp 20250219155207 and revision id 30317810. 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