Chemistry:Smithite
From HandWiki
| Smithite | |
|---|---|
 Red smithite with imhofite | |
| General | |
| Category | sulfosalt mineral |
| Formula (repeating unit) | AgAsS 2 |
| Strunz classification | 2.GC.30 |
| Crystal system | Monoclinic |
| Identification | |
| Formula mass | 246.92 g/mol |
| Color | Pale red (changes to orange on exposure to light) |
| Crystal habit | hexagonal pyramid |
| Cleavage | Perfect, parallel to (100) |
| Mohs scale hardness | 1.5 – 2 |
| |re|er}} | Adamantine |
| Streak | vermilion |
| Specific gravity | 4.88 |
| References | [1] |
Smithite is a sulfosalt mineral with the chemical formula AgAsS
2. It was first described by mineralogist R H Solly in 1905, in samples from the Lengenbach quarry near Binn, Switzerland, and was named for Herbert Smith, who was an assistant in the department of mineralogy of the British Museum (Natural History).[3] Smithite is a dimorph of trechmannite.
References
- ↑ "Smithite.". https://www.mindat.org/min-3687.html. Retrieved 2024-10-27.
- ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.
- ↑ Solly, RH (1905). "Some new minerals from the Binnenthal, Switzerland". Mineralogical Magazine 14 (64): 72–82. doi:10.1180/minmag.1905.014.64.03. Bibcode: 1905MinM...14...72S. https://rruff.geo.arizona.edu/doclib/MinMag/Volume_14/14-64-72.pdf.
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