Jordanite is a

sulfosalt mineral Sulfosalt minerals are sulfide minerals with the general formula , where *A represents a metal such as copper, lead, silver, iron, and rarely mercury, zinc, vanadium *B usually represents semi-metal such as arsenic, antimony, bismuth, and ra ...

with chemical formula in the

monoclinic In crystallography, the monoclinic crystal system is one of the seven crystal systems. A crystal system is described by three vectors. In the monoclinic system, the crystal is described by vectors of unequal lengths, as in the orthorhombic ...

crystal system In crystallography, a crystal system is a set of point groups (a group of geometric symmetries with at least one fixed point). A lattice system is a set of Bravais lattices. Space groups are classified into crystal systems according to their poi ...

,Mindat information page for Jordanite
/ref> 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 The Mohs scale of mineral hardness () is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of various minerals through the ability of harder material to scratch softer material. The scale was introduced in 1812 by the ...

, has a density of approximately 6.4, and a conchoidal fracture. The

type locality Type locality may refer to: * Type locality (biology) * Type locality (geology) See also * Local (disambiguation) * Locality (disambiguation) {{disambiguation ...

is the Lengenbach Quarry in the

Binn Binn (Walser German: ''Bìi'') is a municipality in the district of Goms in the canton of Valais in Switzerland. The Binn Valley is known for its rich mineral deposits, some types of which are unique to the area. The notable Lengenbach Qua ...

Valley, Wallis, Switzerland.

References

Sulfosalt minerals Lead minerals Monoclinic minerals Minerals in space group 11 Arsenic minerals Antimony minerals {{sulfide-mineral-stub