Species / Sulfates / #0135
Alum-(K)
Sulfates cubic #0135
Alum-(K) is a mineral species described as sulfate mineral. It is classified under the Nickel-Strunz scheme and its reference data is listed below.
| Formula | KAl(SO₄)₂·12H₂O |
| Strunz code | 7.CC.20 |
| Class | Sulfates |
| Crystal system | cubic |
| Type locality | — |
| Named after | alum |
| Streak | — |
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Composition
O
52.71%
S
23.62%
K
13.59%
Al
9.38%
H
0.7%
Molar mass 287.734 g/mol
Physical
Mohs
Density
g/cm³