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Alunite from
The Geysers, West Mayacmas Mining District, Sonoma Co., California, USA

Classification
Species:Alunite
Formula:KAl3(SO4)2(OH)6
Comments:In 3-9 cm thick veins near Lemonade Springs where it appeared hard and porcelaneous with a smooth fracture, and nearby in veins with greater witdth- where it appeared soft and resembled white clay. (Dunning & Cooper 1993)
Abundance at site:Common
Confirmation
Validity:Believed Valid
References
References:Vonsen, Magnus (1941) Preliminary report on minerals of The Geysers of Sonoma County, California. Mineralogist: 9: 247; Vonsen, Magnus (1946), Minerals at “The Geysers,” Sonoma County, California: California Division Mines Report 42: 290; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 265; Dunning, G.S. & Cooper, J.F. (1993): History and minerals of The Geysers Sonoma County, California. Mineralogical Record (1993): 24(5): 339-352.
Data
Mineral Data:Click here to view Alunite data
Locality Data:Click here to view The Geysers, West Mayacmas Mining District, Sonoma Co., California, USA
Nearest other occurrences of Alunite
25.4km (15.8 miles) Sulphur Bank Mine (Sulfur Bank Mine; Sulphur Bank deposits), Clear Lake Oaks, Sulphur Creek Mining District (Sulfur Creek Mining District; Wilbur Springs Mining District), Lake Co., California, USA
43.3km (26.9 miles) Sulphur Creek deposit, Sulphur Creek Mining District (Sulfur Creek Mining District; Wilbur Springs Mining District), Coast Ranges, Colusa Co., California, USA
53.8km (33.4 miles) Unnamed Alunite occurrence [1], Hooker Canyon, Glen Ellen, Sonoma Mts, Sonoma Co., California, USA
 
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