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Bukovite

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Bukovite
Bukovite: metallic grayish-brown grains are noted by the two red dots
General
CategorySelenide – Bukovite group
Formula
(repeating unit)
Tl2(CuFe)4Se4
IMA symbolBko[1]
Strunz classification2.BD.30
Dana classification2.5.5.2
Crystal systemTetragonal
Crystal classDitetragonal dipyramidal (4/mmm)
H-M symbol: (4/m 2/m 2/m)
Space groupI4/mmm
Unit cellV = 216.58 Å3
Identification
ColorGrayish-brown
CleavageDistinct/good: Good on {001} imperfect on {100}
Mohs scale hardness2
LusterMetallic
DiaphaneityOpaque
Specific gravity7.40 (calculated)
References[2][3]

Bukovite is a rare selenide mineral with formula Tl2Cu3FeSe4. It is a brown to black metallic mineral which crystallizes in the tetragonal system.[2]

It was first described in 1971 for an occurrence in the Bukov uranium mine, Rožná deposit, Vysočina Region, Moravia, Czech Republic.[3] It has also been reported in Skrikerum, near Tryserum, Kalmar, Sweden; near Vernet-la-Varenne, Puy-de-Dôme, France; and Tuminico, Sierra de Cacho, La Rioja Province, Argentina.[2]

See also

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References

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  1. ^ 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.
  2. ^ a b c Handbook of Mineralogy
  3. ^ a b http://www.mindat.org/min-797.html Mindat