cylindrite

{{Infobox mineral | name = Cylindrite | boxwidth = | boxbgcolor = | image = Cylindrite - San Francisco Mine, Poopó town, Oruro Department, Bolivia.JPG | imagesize = 260px | alt = | caption = | category = Sulfosalt minerals | formula = Pb3Sn4FeSb2S14 | IMAsymbol=Cy | molweight = 1,844.71 g/mol | strunz = 2.HF.25a | dana = 03.01.04.01 | system = Triclinic | symmetry = | unit cell = | color = | colour = Lead grey, greyish black | habit = Cylindrical | twinning = | cleavage = Perfect on {100} | fracture = | tenacity = Malleable | mohs = | lustre = Metallic | streak = Black | diaphaneity = Opaque | gravity = 5.4 – 5.42 | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = }}

Cylindrite is a sulfosalt mineral containing tin, lead, antimony and iron with formula: Pb3Sn4FeSb2S14. It forms triclinic pinacoidal crystals which often occur as tubes or cylinders which are in fact rolled sheets. It has a black to lead grey metallic colour with a Mohs hardness of 2 to 3 and a specific gravity of 5.4.