Freieslebenite

Freieslebenite is a rare sulfide mineral of antimony, lead and silver with formula AgPbSbS₃ and molecular weight of 533.02 g/mol. It is an opaque non-fluorescent mineral which has a hydrothermal origin. It is metallic, with a specific gravity of 6.3 and a Mohs hardness of 2.5 - about that of a finger nail. It is non-magnetic and is usually gray in colour. It has indistinct cleavage, and is brittle and has a conchoidal fracture. It can have a white or gray streak. It crystallizes in the monoclinic system.

Additional recommended knowledge

Daily Visual Balance Check

Essential Laboratory Skills Guide

Don't let static charges disrupt your weighing accuracy

Freieslebenite is normally found in Europe, usually in Romania and Germany. It was discovered in 1845, and is named after Johann Karl Freiesleben (1774 - 1846), Mining Commissioner of Saxony, Germany.

See also

• List of minerals
• List of minerals named after people

References

• Mindat
• WebMineral
• EuroMineral