Daubréelite
Sulfide mineral / From Wikipedia, the free encyclopedia
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Not to be confused with the bismuth oxohalide mineral Daubréeite.
Daubréelite is a rare sulfide mineral. It crystallizes with cubic symmetry and has chemical composition of Fe2+Cr3+2S4. It usually occurs as black platy aggregates.[5]
Quick Facts General, Category ...
Daubréelite | |
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General | |
Category | Sulfide mineral |
Formula (repeating unit) | Fe2+Cr3+2S4 |
IMA symbol | Dbr[1] |
Strunz classification | 2.DA.05 |
Dana classification | 02.10.01.11 |
Crystal system | Cubic |
Crystal class | Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m) |
Space group | Fd3m |
Unit cell | a = 9.966 Å; Z = 8 |
Identification | |
Color | Black |
Crystal habit | Massive, platy aggregates, exsolution lamellae in troilite |
Cleavage | Distinct |
Fracture | Uneven |
Tenacity | Brittle |
Mohs scale hardness | 4.5–5 |
Luster | Metallic |
Streak | Brown or black |
Diaphaneity | Opaque |
References | [2][3][4] |
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