Chemistry:Akrochordite
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| Akrochordite | |
|---|---|
 Bright green, vitreous, cluster of eveite (under 0.5 mm) and brown, subhedral akrochordite in a contrasting, pink, granular carbonate matrix | |
| General | |
| Category | Phosphate minerals |
| Formula (repeating unit) | (Mn,Mg) 4(AsO 4) 2(OH) 4 · 4H2O |
| Strunz classification | 8.DD.10 |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | P21/c |
| Identification | |
| Color | Yellowish red-brown, pale to dark brown, pale pink |
| Cleavage | Perfect. On {010} , perfect; a second, perpendicular to the first. |
| Tenacity | Brittle |
| Mohs scale hardness | 3 1⁄2 |
| |re|er}} | Sub-Vitreous, resinous, dull |
| Diaphaneity | Translucent |
| References | [1][2][3] |
Akrochordite is a rare hydrated arsenate mineral with the chemical formula (Mn,Mg)
4(AsO
4)
2(OH)
4 · 4H2O and represents a small group of rare manganese (Mn) arsenates and, similarly to most other Mn-bearing arsenates, possess pinkish colour. It is typically associated with metamorphic Mn deposits.[2][5]
References
- ↑ Mineralienatlas
- ↑ 2.0 2.1 Mindat
- ↑ Webmineral data
- ↑ 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.
- ↑ Handbook of Mineralogy
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