Species / Sulfates / #0155
Alunite
Sulfates trigonal #0155
Alunite is a mineral species described as alunite supergroup, sulfate mineral. It is classified under the Nickel-Strunz scheme and its reference data is listed below.
| Formula | KAl₃(SO₄)₂(OH)₆ |
| Strunz code | 7.BC.10 |
| Class | Sulfates |
| Crystal system | trigonal |
| Type locality | — |
| Named after | alum |
| Streak | white |
Composition
O
54.08%
Al
19.54%
S
15.48%
K
9.44%
H
1.46%
Molar mass 414.198 g/mol
Physical
Mohs
Density
g/cm³