Jordanite
Jordanite | |
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Jordanite from Binnental, Switzerland | |
General | |
Category | Sulfosalt minerals |
Formula (repeating unit) | Pb14(As,Sb)6S23 |
Strunz classification | 2.JB.30a |
Crystal system | Monoclinic |
Crystal class |
Prismatic (2/m) H-M symbol: (2/m) |
Space group | P21/m |
Identification | |
Colour | Lead-grey |
Cleavage | Perfect |
Fracture | Conchoidal |
Tenacity | Brittle |
Mohs scale hardness | 3 |
Lustre | Metallic |
Streak | Black |
Density | 6.4 |
Pleochroism | Visible |
Jordanite is a sulfosalt mineral with chemical formula Pb14(As,Sb)6S23 in the monoclinic crystal system,[1] named after the German scientist Dr H. Jordan (1808–1887) who discovered it in 1864.
Lead-grey in colour (frequently displaying an iridescent tarnish), its streak is black and its lustre is metallic. Jordanite has a hardness of 3 on Mohs scale, has a density of approximately 6.4, and a conchoidal fracture.[1]
The type locality is the Lengenbach Quarry in the Binn Valley, Wallis, Switzerland.[1]
References
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