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 rarely ...

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 Vector (geometric), vectors. In the monoclinic system, the crystal is described by vectors of unequal lengths, as in t ...

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 (an infinite array of discrete points). Space groups (symmetry groups ...

,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 minerals through the ability of harder material to scratch softer material. The scale was introduced in 1812 by the Ger ...

, has a density of approximately 6.4, and a conchoidal

fracture Fracture is the appearance of a crack or complete separation of an object or material into two or more pieces under the action of stress (mechanics), stress. The fracture of a solid usually occurs due to the development of certain displacemen ...

. The type locality is the

Lengenbach Quarry The Lengenbach Quarry is located in the Binn Valley (Valais, Switzerland) and it is noted among the mineralogical community for its unusual sulfosalt mineral specimens. The dolomite hosted deposit of the quarry is in the Binn Valley, a small ...

in the

Binn Binn (Walser German: ''Bìi'') is a Municipalities of Switzerland, municipality in the district of Goms (district), Goms in the Cantons of Switzerland, canton of Valais in Switzerland. The Binn Valley is known for its rich mineral deposits, som ...

Valley, Wallis,

Switzerland Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...

References

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