{{Short description|Tantalum oxide mineral}} {{Infobox mineral | name = Tantite | boxwidth = | boxbgcolor = | image = | imagesize = | alt = | caption = | category = Oxide minerals | formula = Ta<sub>2</sub>O<sub>5</sub> | IMAsymbol = Tan<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}</ref> | molweight = 441.89 g/mol | strunz = 4.EA.05 | dana = 04.06.06.01 | system = Triclinic | class = Pedial (1) <br/><small>(same H-M symbol)</small> | symmetry = ''P1'' | unit cell = a = 3.8 Å, b = 3.79 Å <br/>c = 35.74 Å; β = 90.18°; Z = 6 | color = Colorless | colour = | habit = | twinning = | cleavage = None | fracture = | tenacity = | mohs = 7 | luster = Adamantine | streak = White | diaphaneity = Transparent | gravity = 8.55 | density = {{val|8.45|ul=g/cm3}} | polish = | opticalprop = Biaxial | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = <ref name=Mindat>{{cite web|title=Tantite mineral information and data|url=http://www.mindat.org/min-3884.html|publisher=Mindat.org|accessdate=2011-11-01}}</ref><ref name=Webmineral>{{cite web|title=Tantite Mineral Data|url=http://www.webmineral.com/data/Tantite.shtml|publisher=Webmineral.com|accessdate=2011-11-01}}</ref> | var1 = | var1text = | var2 = | var2text = | var3 = | var3text = | var4 = | var4text = | var5 = | var5text = | var6 = | var6text = }} '''Tantite''' is a rare tantalum oxide mineral with formula: Ta<sub>2</sub>O<sub>5</sub>. Tantite forms transparent microscopic colorless triclinic - pedial crystals with an adamantine luster. It has a Mohs hardness of 7 and a high specific gravity of 8.45. Chemical analyses show minor inclusion (1.3%) of niobium oxide.
It was first described in 1983 for an occurrence in a pegmatite in the Kola peninsula, Russia. It has also been reported from a pegmatite complex in Florence County, Wisconsin. Associated mineral species include elbaite, lepidolite, spodumene, columbite-tantalite, wodginite, and microlite.
==References== {{Reflist}} *[https://web.archive.org/web/20060910171820/http://www.uwrf.edu/~wc01/tantite.htm Wisconsin minerals] Accessed March 31, 2006. *[http://rruff.geo.arizona.edu/doclib/hom/tantite.pdf American Mineralogist data sheet] PDF Accessed March 31, 2006.
Category:Tantalum minerals Category:Oxide minerals Category:Triclinic minerals Category:Minerals in space group 1 Category:Minerals described in 1983
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