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id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</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="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Norwegian mineralogist and geologist</div> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox biography vcard"><tbody><tr><th colspan="2" class="infobox-above" style="font-size:125%;"><div class="fn">Tellef Dahll</div></th></tr><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Tellef_Dahll.jpeg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Tellef_Dahll.jpeg/220px-Tellef_Dahll.jpeg" decoding="async" width="220" height="353" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Tellef_Dahll.jpeg/330px-Tellef_Dahll.jpeg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Tellef_Dahll.jpeg/440px-Tellef_Dahll.jpeg 2x" data-file-width="499" data-file-height="800" /></a></span></td></tr><tr><th scope="row" class="infobox-label">Born</th><td class="infobox-data"><span style="display:none">(<span class="bday">1825-04-10</span>)</span>10 April 1825<br /><div style="display:inline" class="birthplace"><a href="/wiki/Krager%C3%B8" title="Kragerø">Kragerø</a>, Norway</div></td></tr><tr><th scope="row" class="infobox-label">Died</th><td class="infobox-data">17 June 1893<span style="display:none">(1893-06-17)</span> (aged 68)</td></tr><tr><th scope="row" class="infobox-label">Nationality</th><td class="infobox-data category">Norwegian</td></tr><tr><th scope="row" class="infobox-label">Occupation</th><td class="infobox-data role">Geologist</td></tr><tr><th scope="row" class="infobox-label">Awards</th><td class="infobox-data"><a href="/wiki/Order_of_St._Olav" title="Order of St. Olav">Order of St. Olav</a><br /><a href="/wiki/Order_of_the_Polar_Star" title="Order of the Polar Star">Order of the Polar Star</a></td></tr></tbody></table> <p><b>Tellef Dahll</b> (10 April 1825, in <a href="/wiki/Krager%C3%B8" title="Kragerø">Kragerø</a> – 17 June 1893, in <a href="/wiki/Morgedal" title="Morgedal">Morgedal</a>) was a <a href="/wiki/Norwegians" title="Norwegians">Norwegian</a> <a href="/wiki/Mineralogist" class="mw-redirect" title="Mineralogist">mineralogist</a> and <a href="/wiki/Geologist" title="Geologist">geologist</a>.<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="Life">Life</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tellef_Dahll&action=edit&section=1" title="Edit section: Life"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>After graduating in minearology from the <a href="/wiki/University_of_Christiania" class="mw-redirect" title="University of Christiania">University of Christiania</a> in 1846, Dahll worked for private mining companies. He found <a href="/wiki/Coal" title="Coal">coal</a> on the island of <a href="/wiki/And%C3%B8ya" title="Andøya">Andøya</a>, <a href="/wiki/Iron_ore" title="Iron ore">iron ore</a> at <a href="/wiki/Bj%C3%B8rnevatn" title="Bjørnevatn">Bjørnevatn</a><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> and in 1867 Dahll discovered <a href="/wiki/Gold" title="Gold">gold</a> from the <a href="/wiki/Tana_(Norway)" title="Tana (Norway)">Tana</a> and <a href="/wiki/Anarjohka" title="Anarjohka">Anarjohka</a> rivers, which launched the <a href="/wiki/Lapland_gold_rush" title="Lapland gold rush">1870 gold rush</a> in the Finnish <a href="/wiki/Lapland_(Finland)" title="Lapland (Finland)">Lapland</a>.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Since 1858 Dahll and <a href="/wiki/Theodor_Kjerulf" title="Theodor Kjerulf">Theodor Kjerulf</a> led the first <a href="/wiki/Norwegian_Geological_Survey" class="mw-redirect" title="Norwegian Geological Survey">geological survey of Norway</a>.<sup id="cite_ref-fontani_4-0" class="reference"><a href="#cite_note-fontani-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>In 1879 Dahll collected samples of <a href="/wiki/Nickel_arsenide" title="Nickel arsenide">nickel arsenide</a> and <a href="/wiki/Gersdorffite" title="Gersdorffite">gersdorffite</a> on the island of <a href="/w/index.php?title=Oter%C3%B8ya&action=edit&redlink=1" class="new" title="Oterøya (page does not exist)">Oterøya</a> in his birthplace Kragerø. Dahll found out that the rocks contained previously unknown element which he named <a href="/wiki/Norwegium" class="mw-redirect" title="Norwegium">Norwegium</a>.<sup id="cite_ref-fontani_4-1" class="reference"><a href="#cite_note-fontani-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> The phosphate mineral <a href="/wiki/Dahllite" class="mw-redirect" title="Dahllite">dahllite</a> (hydroxylapatite) is named after Tellef Dahll and his brother, the mineralogist <a href="/w/index.php?title=Johann_Dahll&action=edit&redlink=1" class="new" title="Johann Dahll (page does not exist)">Johann Dahll</a>.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tellef_Dahll&action=edit&section=2" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://nbl.snl.no/Tellef_Dahll">Tellef Dahll</a> Norsk Biografisk Leksikon. Retrieved 1 October 2015. (Norwegian)</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.sydvarangergruve.no/index.php?option=com_content&view=article&id=17:who-we-are&catid=2:uncategorised&lang=en&Itemid=121">Who We Are</a> Sydvaranger Gruve AS. Retrieved 1 October 2015.</span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text">Derek Maier, Wolfgang & Lahtinen, Raimo & O'Brien, Hugh: ″Mineral Deposits of Finland″, p. 7–8. Elsevier, 2015. <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-012-41043-8-9" title="Special:BookSources/978-012-41043-8-9">978-012-41043-8-9</a>. <a rel="nofollow" class="external text" href="https://books.google.com/books?id=c0abBwAAQBAJ&dq=Tellef+Dahll+geologist&pg=PA7">Google Books</a></span> </li> <li id="cite_note-fontani-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-fontani_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-fontani_4-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text">Fontani, Marco & Costa, Mariagrazia & Oma, Mary Virginia: ″The Lost Elements: The Periodic Table's Shadow Side″, p. 136. Oxford University Press, 2014. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-019-93833-4-4" title="Special:BookSources/978-019-93833-4-4">978-019-93833-4-4</a>. <a rel="nofollow" class="external text" href="https://books.google.com/books?id=Ck9jBAAAQBAJ&dq=Tellef+Dahll+geologist&pg=PA136">Google Books</a></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.vanderkrogt.net/elements/element.php?sym=Hf">Hafnium</a> Elementymology & Elements Multidict. Retrieved 1 October 2015.</span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.merriam-webster.com/medical/dahllite">Dahllite Medical Definition</a> Merriam-Webster Medical Dictionary. Retrieved 1 October 2015.</span> </li> </ol></div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist 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aria-labelledby="Authority_control_databases_frameless&#124;text-top&#124;10px&#124;alt=Edit_this_at_Wikidata&#124;link=https&#58;//www.wikidata.org/wiki/Q3378064#identifiers&#124;class=noprint&#124;Edit_this_at_Wikidata" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Authority_control_databases_frameless&#124;text-top&#124;10px&#124;alt=Edit_this_at_Wikidata&#124;link=https&#58;//www.wikidata.org/wiki/Q3378064#identifiers&#124;class=noprint&#124;Edit_this_at_Wikidata" style="font-size:114%;margin:0 4em"><a href="/wiki/Help:Authority_control" title="Help:Authority control">Authority control databases</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q3378064#identifiers" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">International</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><ul><li><span class="uid"><a rel="nofollow" class="external text" href="https://isni.org/isni/0000000001578091">ISNI</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://viaf.org/viaf/10211696">VIAF</a></span></li></ul></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">National</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"><ul><li><span class="uid"><a rel="nofollow" class="external text" href="https://d-nb.info/gnd/117617164">Germany</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://id.loc.gov/authorities/n2021020753">United States</a></span></li><li><span class="uid"><span class="rt-commentedText tooltip tooltip-dotted" title="Dahll, Tellef <1825-1893>"><a rel="nofollow" class="external text" href="https://opac.sbn.it/nome/TO0V468228">Italy</a></span></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="http://data.bibliotheken.nl/id/thes/p364334207">Netherlands</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://authority.bibsys.no/authority/rest/authorities/html/90095864">Norway</a></span></li></ul></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><ul><li><span class="uid"><a rel="nofollow" class="external text" href="https://www.idref.fr/145368599">IdRef</a></span></li></ul></div></td></tr></tbody></table></div> <p><br /> </p> <style data-mw-deduplicate="TemplateStyles:r1012311289">.mw-parser-output .asbox{position:relative;overflow:hidden}.mw-parser-output .asbox table{background:transparent}.mw-parser-output .asbox p{margin:0}.mw-parser-output .asbox p+p{margin-top:0.25em}.mw-parser-output .asbox-body{font-style:italic}.mw-parser-output .asbox-note{font-size:smaller}.mw-parser-output .asbox .navbar{position:absolute;top:-0.75em;right:1em;display:none}</style><div role="note" class="metadata plainlinks asbox stub"><table role="presentation"><tbody><tr class="noresize"><td><span style="vertical-align:middle; background:transparent; color:inherit;"><span class="mw-image-border" typeof="mw:File"><a href="/wiki/File:Flag_of_Norway.svg" class="mw-file-description"><img alt="Flag of Norway" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Flag_of_Norway.svg/40px-Flag_of_Norway.svg.png" decoding="async" width="40" height="29" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Flag_of_Norway.svg/60px-Flag_of_Norway.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Flag_of_Norway.svg/80px-Flag_of_Norway.svg.png 2x" data-file-width="512" data-file-height="372" /></a></span><span style="margin-left:-40px; margin-right:10px;"><span typeof="mw:File"><a href="/wiki/File:Scientist.svg" class="mw-file-description"><img alt="Scientist icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/03/Scientist.svg/30px-Scientist.svg.png" decoding="async" width="30" height="30" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/03/Scientist.svg/45px-Scientist.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/03/Scientist.svg/60px-Scientist.svg.png 2x" data-file-width="400" data-file-height="400" /></a></span></span></span> <span typeof="mw:File"><a href="/wiki/File:Science-symbol-2.svg" class="mw-file-description"><img alt="Stub icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/75/Science-symbol-2.svg/30px-Science-symbol-2.svg.png" decoding="async" width="30" height="30" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/75/Science-symbol-2.svg/45px-Science-symbol-2.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/75/Science-symbol-2.svg/60px-Science-symbol-2.svg.png 2x" data-file-width="87" data-file-height="87" /></a></span></td><td><p class="asbox-body">This article about a Norwegian scientist is a <a href="/wiki/Wikipedia:Stub" title="Wikipedia:Stub">stub</a>. 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