{{infobox mineral | name = Fingerite | image =Fingerite.jpg | caption =Image of a Fingerite | category = Vanadate mineral | formula = β-Cu<sub>2</sub>V<sub>2</sub>O<sub>5</sub> | IMAsymbol = Fgr<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> | strunz = 8.BB.80 | dana = | system = Triclinic | class = Pinacoidal ({{overline|1}}) <br/>H-M symbol: ({{overline|1}}) | symmetry = ''P''{{overline|1}} | unit cell = a = 8.16, b = 8.27 <br/>c = 8.04 [Å]; α = 107.14° <br/>β = 91.39°, γ = 106.44°; Z = 1 | color = Black; medium gray in reflected light | habit = Subhedral or anhedral; equant or platelike; up to 150 μm | twinning = | cleavage = None | fracture = | tenacity = | mohs = | luster = Metallic | streak = Dark reddish brown | diaphaneity = Opaque | gravity = | density = 4.78 | polish = | opticalprop = Biaxial | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = Dissolves in water | impurities = | alteration = | other = | references = <ref name=HBM>[http://rruff.geo.arizona.edu/doclib/hom/fingerite.pdf Fingerite in The Handbook of Mineralogy]</ref><ref name=Mindat>[http://www.mindat.org/min-1550.html Fingerite] on Mindat.org</ref><ref name=Webmin>[http://webmineral.com/data/Fingerite.shtml Fingerite data on Webmineral]</ref> }} '''Fingerite''' is a copper vanadate mineral with formula: β-Cu<sub>2</sub>V<sub>2</sub>O<sub>5</sub>. It was discovered as triclinic crystals occurring as volcanic sublimates around fumaroles in the crater of the Izalco Volcano, El Salvador.
Associated minerals include thenardite, euchlorine, stoiberite, shcherbinaite, ziesite, bannermanite, chalcocyanite and chalcanthite.<ref name=HBM/> The mineral also dissolves in water.<ref>{{Cite news |title=For a special Valentine? Beyond diamonds and gems: The world's rarest minerals |url=https://phys.org/news/2016-02-special-valentine-diamonds-gems-world.html |access-date=November 15, 2023}}</ref>
Fingerite is named for Dr. Larry W. Finger (1940–2024<ref>{{Cite web |date=2024-06-28 |title=Larry Finger – Hixson-Klein Funeral Home |url=https://hkfuneralhome.com/larry-finger/ |access-date=2024-06-28 |archive-url=https://web.archive.org/web/20240628100818/https://hkfuneralhome.com/larry-finger/ |archive-date=2024-06-28 }}</ref>) of the Geophysical Laboratory, Carnegie Institution of Washington.
==References== {{Reflist}}
Category:Copper minerals Category:Vanadate minerals Category:Triclinic minerals Category:Minerals in space group 2
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