freieslebenite

{{Infobox mineral | name = Freieslebenite | image = Freieslebenit - Mineralogisches Museum Bonn (7267).jpg | imagesize = 260px | alt = | caption = Freieslebenite from Hiendelaencina, Spain. Exposed in the Mineralogical Museum, Bonn, Germany | category = Sulfosalt minerals | formula = AgPbSbS3 | IMAsymbol = Flb | molweight = | strunz = 2.JB.15 | dana = | system = Monoclinic | class = Prismatic (2/m) (same H-M symbol) | symmetry = P21/n | unit cell = a = 7.518(1) b = 12.809(4) c = 5.940(1) [Å] β = 92.25(1)°; Z = 4 | color = Pale steel-gray to silver-white or lead-gray | colour = | habit = Striated, prismatic crystals, inclusions and exsolutions in galena and other silver minerals | twinning = Twin plane {010} | cleavage = {110} Indistinct | fracture = Brittle-conchoidal | tenacity = | mohs = 2.5 | luster = Metallic | streak = Whitish-gray | diaphaneity = Opaque | gravity = 6.20–6.23 | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = Very weak | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | references = }} Freieslebenite is a sulfosalt mineral composed of antimony, lead, and silver. Sulfosalt minerals are complex sulfide minerals with the formula: AmBnSp. The formula of freieslebenite is AgPbSbS3.

Freieslebenite was discovered in approximately 1773 in the Himmelsfurst mines of Freiberg, Saxony, Germany. The mineral was initially called Schilf-Glaserz; however, in 1845 it was given the current name Freieslebenite after the Mining Commissioner of Saxony, Johann Carl Freiesleben (1774–1846).