Jordanite

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Jordanite
Jordanit - Binnental, Schweiz.jpg
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)
(same H-M symbol)
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 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[edit]