Jordanite

Jordanite is a sulfosalt mineral with chemical formula Pb
14
(As,Sb)
6
S
23
in the monoclinic crystal system,[1] named after the German scientist H. Jordan (1808–1887) who discovered it in 1864.

Jordanite
General
CategorySulfosalt minerals
Formula
(repeating unit)
Pb
14
(As,Sb)
6
S
23
Strunz classification2.JB.30a
Crystal systemMonoclinic
Crystal classPrismatic (2/m)
(same H-M symbol)
Space groupP21/m
Identification
ColourLead-grey
CleavagePerfect
FractureConchoidal
TenacityBrittle
Mohs scale hardness3
LustreMetallic
StreakBlack
Density6.4
PleochroismVisible

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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