| Apjohnite | |
|---|---|
 Apjohnite (white) found with ilesite | |
| General | |
| Category | Mineral |
| Formula (repeating unit) | MnAl2(SO4)4·22H2O |
| IMA symbol | API |
| Identification | |
| Color | Colourless, white, light pink, light yellow, light green |
| Mohs scale hardness | 1.5-2 |
| Luster | Silky |
| Streak | White |
| Diaphaneity | Transparent, Translucent |
| Specific gravity | 1.78 - 1.81 |
| Density | 1.78 - 1.81 g/cm3 (Measured) 1.836 g/cm3 (Calculated) |
Apjohnite (IMA symbol: Apj) is a manganese aluminium sulfate mineral with the chemical formula MnAl2(SO4)4·22H2O. It was named after Trinity College Dublin professor James Apjohn. Its type locality is Maputo Province, Mozambique.
References
- 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.
- Apjohnite Archived 2019-03-26 at the Wayback Machine on mindat.org
External links
- Apjohnite data sheet on Webmineral
- Apjohnite on the Handbook of Mineralogy
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