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Ammonioalunite
Type Locality
The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Mineral Data
(NH
4
)Al
3
(SO
4
)
2
(OH)
6
Strunz:
7.BC.10
Physical Properties
Crystal System:
Trigonal
Streak:
white
Hardness:
2.0 - 3.0
