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 | |
| Category | Sulfosalt minerals |
| Formula (repeating unit) | Pb3Sn4FeSb2S14 |
| IMA symbol | Cy[1] |
| Strunz classification | 2.HF.25a |
| Dana classification | 03.01.04.01 |
| Crystal system | Triclinic |
| Identification | |
| Formula mass | 1,844.71 g/mol |
| Colour | Lead grey, greyish black |
| Crystal habit | Cylindrical |
| Cleavage | Perfect on {100} |
| Tenacity | Malleable |
| Mohs scale hardness | 2+1⁄2 |
| Lustre | Metallic |
| Streak | Black |
| Diaphaneity | Opaque |
| Specific gravity | 5.4 – 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 edit
References edit
- ^ 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.
- ^ "Mineral galleries". Archived from the original on 2006-01-11. Retrieved 2006-01-18.
- ^ "Cylindrite Mineral Data". webmineral.com. Retrieved 2015-11-24.
- ^ "Cylindrite: Cylindrite mineral information and data". mindat.org. Retrieved 2015-11-24.
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