Category Sulfosalt minerals Strunz classification 2.JB.30a Space group P21/m | Formula
(repeating unit) Pb14(As,Sb)6S23 Crystal system Monoclinic | |
 | ||
Crystal class Prismatic (2/m)
(same H-M symbol) | ||
Jordanite is a sulfosalt mineral with chemical formula Pb14(As,Sb)6S23 in the monoclinic crystal system, 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.
The type locality is the Lengenbach Quarry in the Binn Valley, Wallis, Switzerland.
References
Jordanite Wikipedia(Text) CC BY-SA