Chemistry:Berthierite
From HandWiki
| Berthierite | |
|---|---|
 | |
| General | |
| Category | Mineral |
| Formula (repeating unit) | FeSb 2S 4 |
| Strunz classification | 2.HA.20 |
| Crystal system | Orthorhombic |
| Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) |
| Space group | Pnam |
| Identification | |
| Color | Steel grey |
| Cleavage | Poor/indistinct |
| Mohs scale hardness | 2–3 |
| |re|er}} | Metallic |
| Diaphaneity | Opaque |
| Specific gravity | 4.64 |
Berthierite is a mineral, a sulfide of iron and antimony with formula FeSb
2S
4 (FeS · Sb
2S
3). It is steel grey in colour with a metallic lustre, which an iridescent tarnish can cover. Because of its appearance, it is often mistaken for stibnite (Sb
2S
3, an antimony trisulfide mineral, free of Fe2+ sulfide).
It was discovered in France in 1827 and named for the French chemist, Pierre Berthier (1782–1861).
Berthierine, an iron(II)-rich phyllosilicate from the serpentine subgroup, with as chemical formula (Mg,Fe)
3(Si
2O
5)(OH)
4, was also named in honor of Pierre Berthier. The great similarity between the two names is a frequent source of confusion between these two very different mineral species.
See also
References
- ↑ 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.
External links
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Wikimedia Commons has media related to Berthierite. |
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