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.

Cylindrite
General
CategorySulfosalt minerals
Formula
(repeating unit)
Pb3Sn4FeSb2S14
IMA symbolCy[1]
Strunz classification2.HF.25a
Dana classification03.01.04.01
Crystal systemTriclinic
Identification
Formula mass1,844.71 g/mol
ColourLead grey, greyish black
Crystal habitCylindrical
CleavagePerfect on {100}
TenacityMalleable
Mohs scale hardness2+12
LustreMetallic
StreakBlack
DiaphaneityOpaque
Specific gravity5.4 – 5.42
References[2][3][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.

See also

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References

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  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ "Mineral galleries". Archived from the original on 2006-01-11. Retrieved 2006-01-18.
  3. ^ "Cylindrite Mineral Data". webmineral.com. Retrieved 2015-11-24.
  4. ^ "Cylindrite: Cylindrite mineral information and data". mindat.org. Retrieved 2015-11-24.