- Cylindrite
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Cylindrite
Trinacria Mine, Callipampa, Poopó Province, Oruro Department, BoliviaGeneral Category Sulfosalt minerals Chemical formula Pb3Sn4FeSb2S14 Strunz classification 02.HF.25a Dana classification 03.01.04.01 Identification Molar mass 1,844.71 Colour Lead grey, greyish black Crystal habit Cylindrical Crystal system Triclinic Cleavage Perfect on {100} Tenacity Malleable Mohs scale hardness 2 ½ Luster Metallic Streak Black Diaphaneity Opaque Specific gravity 5.4 - 5.42 References [1][2][3] 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.
It was first discovered in the Santa Cruz mine, Oruro Department, Bolivia in 1893. The name arises from its curious cylindrical crystal which it forms almost uniquely among minerals.
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