Bukovite

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Bukovite
Bukovite-605903.jpg
Bukovite: metallic grayish-brown grains are noted by the two red dots
General
Category Selenide - Bukovite group
Formula
(repeating unit)
Tl2(CuFe)4Se4
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 Å³
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 [1][2]

Bukovite is a rare selenide mineral with formula Tl2Cu3FeSe4. It is a brown to black metallic mineral which crystallizes in the tetragonal system.[1]

It was first described in 1971 for an occurrence in the Bukov uranium mine, Rožná deposit, Vysočina Region, Moravia, Czech Republic.[2] 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.[1]

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