Thortveitite: Difference between revisions
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'''Thortveitite''' is a rare [[mineral]] consisting of [[scandium]] [[yttrium]] [[silicate]] (Sc,Y)<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>. It is the most widespread [[scandium]] mineral,<ref>{{mindat|url=https://www.mindat.org/element/Scandium|title=Scandium|access-date=2025-05-29}}</ref> but natural thortveitite is not widely exploited as a source of scandium metal. Most scandium is derived from [[mine tailings]], which can include thortveitite.<ref>{{cite web |url=https://www.stanfordmaterials.com/blog/an-overview-of-scandium.html |title=Properties of Scandium |last=Lowen |first=Eric |website=Stanford Advanced Materials |access-date=Sep 24, 2024}}</ref> Thortveitite mining in the [[United States]] ceased in 1969.<ref>{{cite web|url=https://pubs.usgs.gov/periodicals/mcs2025/mcs2025-scandium.pdf|publisher=U.S. Geological Survey|website=National Minerals Information Center|author=Shelby Johnston|title=Mineral Commodity Summaries 2025: Scandium|access-date=2025-05-29}}</ref> | '''Thortveitite''' is a rare [[mineral]] consisting of [[scandium]] [[yttrium]] [[silicate]] (Sc,Y)<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>. It is the most widespread [[scandium]] mineral,<ref>{{mindat|url=https://www.mindat.org/element/Scandium|title=Scandium|access-date=2025-05-29}}</ref> but natural thortveitite is not widely exploited as a source of scandium metal. Most scandium is derived from [[mine tailings]], which can include thortveitite.<ref>{{cite web |url=https://www.stanfordmaterials.com/blog/an-overview-of-scandium.html |title=Properties of Scandium |last=Lowen |first=Eric |website=Stanford Advanced Materials |access-date=Sep 24, 2024}}</ref> Thortveitite mining in the [[United States]] ceased in 1969.<ref>{{cite web|url=https://pubs.usgs.gov/periodicals/mcs2025/mcs2025-scandium.pdf|publisher=U.S. Geological Survey|website=National Minerals Information Center|author=Shelby Johnston|title=Mineral Commodity Summaries 2025: Scandium|access-date=2025-05-29}}</ref> | ||
Occurrence is in granitic [[pegmatite]]s. It was named after [[Olaus Thortveit]], a [[Norway|Norwegian]] engineer. It is grayish-green, black or gray in color.<ref>{{Cite web|title=Thortveitite Mineral Data|url=http://webmineral.com/data/Thortveitite.shtml#.YI_Dr7UzZEY|access-date=2021-05-03|website=webmineral.com}}</ref><ref>{{Cite web|title=Thortveitite|url=https://www.mindat.org/min-3950.html|access-date=2021-05-03|website=www.mindat.org}}</ref><ref>{{Cite journal|last1=Bianchi|first1=Riccardo|last2=Pilati|first2=Tullio|last3=Diella|first3=Valeria|last4=Gramaccioli|first4=Carlo Maria|last5=Mannucci|first5=Gregorio|date=1988-06-01|title=A re-examination of thortveitite|url=https://pubs.geoscienceworld.org/msa/ammin/article-abstract/73/5-6/601/105009/A-re-examination-of-thortveitite|journal=American Mineralogist|language=en|volume=73|issue=5–6|pages=601–607|issn=0003-004X}}</ref><ref>{{Cite book | Occurrence is in granitic [[pegmatite]]s. It was named after [[Olaus Thortveit]], a [[Norway|Norwegian]] engineer. It is grayish-green, black or gray in color.<ref>{{Cite web|title=Thortveitite Mineral Data|url=http://webmineral.com/data/Thortveitite.shtml#.YI_Dr7UzZEY|access-date=2021-05-03|website=webmineral.com}}</ref><ref>{{Cite web|title=Thortveitite|url=https://www.mindat.org/min-3950.html|access-date=2021-05-03|website=www.mindat.org}}</ref><ref>{{Cite journal|last1=Bianchi|first1=Riccardo|last2=Pilati|first2=Tullio|last3=Diella|first3=Valeria|last4=Gramaccioli|first4=Carlo Maria|last5=Mannucci|first5=Gregorio|date=1988-06-01|title=A re-examination of thortveitite|url=https://pubs.geoscienceworld.org/msa/ammin/article-abstract/73/5-6/601/105009/A-re-examination-of-thortveitite|journal=American Mineralogist|language=en|volume=73|issue=5–6|pages=601–607|issn=0003-004X}}</ref><ref>{{Cite book|title=Mineralien aus aller Welt|date=1990|others=Walter Schumann|isbn=978-3-405-14003-8|location=München|oclc=610708490}}</ref> | ||
A transparent gem quality example was found in 2004, and reported in ''The Journal of Gemmology''.<ref>{{Cite journal|last=Chapman, R., Mercer, I.F., Rankin, A.H., Spratt, J.|date=2008|title=Thortveitite – a new gemstone|url=https://gem-a.com/images/Documents/JoG/JoG2009_31_5-8.pdf#page=3|journal=Journal of Gemmology|volume=31|issue=1 |pages=1–6|doi=10.15506/JoG.2008.31.1.1|bibcode=2008JGem...31....1C }}</ref> | A transparent gem quality example was found in 2004, and reported in ''The Journal of Gemmology''.<ref>{{Cite journal|last=Chapman, R., Mercer, I.F., Rankin, A.H., Spratt, J.|date=2008|title=Thortveitite – a new gemstone|url=https://gem-a.com/images/Documents/JoG/JoG2009_31_5-8.pdf#page=3|journal=Journal of Gemmology|volume=31|issue=1 |pages=1–6|doi=10.15506/JoG.2008.31.1.1|bibcode=2008JGem...31....1C }}</ref> | ||
Latest revision as of 20:42, 18 July 2025
Template:Short description Template:Infobox mineral
Thortveitite is a rare mineral consisting of scandium yttrium silicate (Sc,Y)2Si2O7. It is the most widespread scandium mineral,[1] but natural thortveitite is not widely exploited as a source of scandium metal. Most scandium is derived from mine tailings, which can include thortveitite.[2] Thortveitite mining in the United States ceased in 1969.[3]
Occurrence is in granitic pegmatites. It was named after Olaus Thortveit, a Norwegian engineer. It is grayish-green, black or gray in color.[4][5][6][7]
A transparent gem quality example was found in 2004, and reported in The Journal of Gemmology.[8]
See also
References
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