Cylindrite

sulfosalt

tin

Formula: FePb3Sn4Sb2S14
Sulfosalt
Specific gravity: 5.43 to 5.49
Hardness: 2½
Streak: Black
Colour: Grey-black
Environments:

Hydrothermal environments

Cylindrite occurs in tin-bearing hydrothermal veins (Webmin, HOM), associated with franckeite, stannite, teallite, jamesonite, boulangerite, cassiterite, galena, pyrite and sphalerite (HOM, Mindat).

The type locality is the Santa Cruz Mine, Poopó town, Poopó Province, Oruro, Bolivia.

At Llallagua, Bolivia, cylindrite has been found on stannite accompanied by franckeite (MinRec 37.2.133).

Common impurities: Ag

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