teallite

{{Infobox mineral | name = Teallite | boxwidth = | boxbgcolor = | image = Teallite-35244.jpg | imagesize = 260px | alt = | caption = | category = Sulfide minerals | formula = PbSnS2 | IMAsymbol = Tel | molweight = | strunz = 2.CD.05 | dana = | system = Orthorhombic | class = Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) | symmetry = Pbnm (no. 62) | unit cell = a = 4.26 Å, b = 11.41 Å c = 4.09 Å; Z = 2 | color = Silvery gray, lead-gray to iron-gray; tarnishes dull or iridescent | colour = | habit = | twinning = | cleavage = {001} perfect (lamellar cleavage); flexible | fracture = | tenacity = Malleable | mohs = – 2 | luster = Metallic | streak = Black | diaphaneity = Opaque | gravity = 6.36 | density = | polish = | opticalprop = Anisotropic | refractive = | birefringence = | pleochroism = Weak | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = }}

Teallite is a sulfide mineral of tin and lead with chemical formula: PbSnS2. It occurs in hydrothermal veins and is sometimes mined as an ore of tin. Teallite forms soft silvery grey mica-like plates and crystallizes in the orthorhombic system. The Mohs hardness is 1.5 to 2 and the specific gravity is 6.4.