Fingerite
(repeating unit)β-Cu2V2O5 IMA symbol Fgr[1] Strunz classification 8.BB.80 Crystal system Triclinic Crystal class Pinacoidal (1)
H-M symbol: (1) Space group P1 Unit cell a = 8.16, b = 8.27
c = 8.04 [Å]; α = 107.14°
β = 91.39°, γ = 106.44°; Z = 1 Identification Color Black; medium gray in reflected light Crystal habit Subhedral or anhedral; equant or platelike; up to 150 μm Cleavage None Luster Metallic Streak Dark reddish brown Diaphaneity Opaque Density 4.78 Optical properties Biaxial Solubility Dissolves in water References [2][3][4]
H-M symbol: (1)
c = 8.04 [Å]; α = 107.14°
β = 91.39°, γ = 106.44°; Z = 1
Fingerite is a copper vanadate mineral with formula: β-Cu2V2O5. 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.[2] The mineral also dissolves in water.[5]
Fingerite is named for Dr. Larry W. Finger (b. 1940-2024[6]) of the Geophysical Laboratory, Carnegie Institution of Washington.
References
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ a b Fingerite in The Handbook of Mineralogy
- ^ Fingerite on Mindat.org
- ^ Fingerite data on Webmineral
- ^ "For a special Valentine? Beyond diamonds and gems: The world's rarest minerals". Retrieved November 15, 2023.
- ^ "Larry Finger – Hixson-Klein Funeral Home". web.archive.org. 2024-06-28. Retrieved 2024-06-28.
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