User:Chris857/Boulangerite
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Boulangerite is a sulfosalt mineral with formula Pb5Sb4S11. The mineral was named in 1837 for Charles Louis Boulanger (1810–1849).
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Quick Facts Boulangerite, General ...
Boulangerite | |
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General | |
Category | Sulfosalt mineral |
Formula (repeating unit) | Pb5Sb4S11 |
Strunz classification | 2.HC.15 |
Dana classification | 3.5.2.1 |
Crystal system | Monoclinic |
Space group | H-M group: 2/m Space group: P21/a |
Unit cell | a = 21.612(7) Å b = 23.543(8) Å c = 8.084(3) Å β = 100.71(2)°, Z=8[1] |
Identification | |
Color | Lead grey |
Cleavage | Distinct on {100} |
Tenacity | Brittle, flexible in thin crystals |
Mohs scale hardness | 2.5–3 |
Luster | Metallic, sometimes silky |
Streak | Brownish |
Diaphaneity | Opaque |
Pleochroism | Weak |
Ultraviolet fluorescence | Non-fluorescent[2] |
References | [3] |
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