Apjohnite | |
---|---|
General | |
Category | Mineral |
Formula (repeating unit) | Mn2+Al2(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[1]) is a manganese aluminium sulfate mineral with the chemical formula Mn2+Al2(SO4)4·22H2O. It was named after Trinity College Dublin professor James Apjohn. Its type locality is Maputo Province, Mozambique.[2]