Bukovite

Bukovite
Bukovite: metallic grayish-brown grains are noted by the two red dots
General
Category	Selenide – Bukovite group
Formula (repeating unit)	Tl2(CuFe)4Se4
IMA symbol	Bko[1]
Strunz classification	2.BD.30
Dana classification	2.5.5.2
Crystal system	Tetragonal
Crystal class	Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m)
Space group	I4/mmm
Unit cell	V = 216.58 Å^3
Identification
Color	Grayish-brown
Cleavage	Distinct/good: Good on {001} imperfect on {100}
Mohs scale hardness	2
Luster	Metallic
Diaphaneity	Opaque
Specific gravity	7.40 (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

• Beraunite

References

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. Handbook of Mineralogy
3. http://www.mindat.org/min-797.html Mindat