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Montmorillonite from
79 Mine (79th Mine; Seventy-Nine Mine; Seventy-Nine property), Chilito, Hayden area, Banner Mining District, Dripping Spring Mts, Gila Co., Arizona, USA

Classification
Species:Montmorillonite
Formula:(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Confirmation
Validity:Believed Valid
References
References:[MinRec 3:247]
Data
Mineral Data:Click here to view Montmorillonite data
Locality Data:Click here to view 79 Mine (79th Mine; Seventy-Nine Mine; Seventy-Nine property), Chilito, Hayden area, Banner Mining District, Dripping Spring Mts, Gila Co., Arizona, USA
Nearest other occurrences of Montmorillonite
6.3km (3.9 miles) Christmas Mine (Red Bird shafts; Inspiration Mine; Hackberry shafts), Christmas, Christmas area, Banner Mining District, Dripping Spring Mts, Gila Co., Arizona, USA
6.7km (4.1 miles) Christmas, Christmas area, Banner Mining District, Dripping Spring Mts, Gila Co., Arizona, USA
13.7km (8.5 miles) Copper Hill prospect, Crozier Peak area, Cottonwood Mining District, Tortilla Mts, Pinal Co., Arizona, USA
21.3km (13.2 miles) Ray Mine, Scott Mountain, Mineral Creek Mining District (Ray Mining District), Dripping Spring Mts, Pinal Co., Arizona, USA
30.6km (19.0 miles) Unnamed wash, adjacent to State Route 177, Superior area, Superior Mining District, Pinal Co., Arizona, USA
40.4km (25.1 miles) Castle Dome Mine (Castle Dome deposit; Pinto Valley deposit), Castle Dome area (Castle Dome Mine area; Pinto Valley Mine area), Inspiration, Miami-Inspiration Mining District, Globe-Miami Mining District, Gila Co., Arizona, USA
42.3km (26.3 miles) Copper Cities Mine (Sleeping Beauty Mine; Lost Gulch Mine; Yellow Metal Mine; Diamond-H Mine), Copper Cities Mine area, Sleeping Beauty Peak, Miami, Miami-Inspiration Mining District, Globe-Miami Mining District, Gila Co., Arizona, USA
50.5km (31.4 miles) Grand Reef Mine (Aravaipa Mine; Lead Jewel; Joe Rubal Mine; Vivian Mine; Calistoga Mining & Development Co. Mine; Bringham Silver and Lead Mine), Laurel Canyon, Grand Reef Mountain, Klondyke, Santa Teresa Mts, Aravaipa Mining District, Graham Co., Arizona, USA
55.5km (34.5 miles) Poston Butte deposit (Continental Oil Co. property; Aztec Exploration and Development Co. property; Florence Conoco; Florence Copper Co. property), Florence, Florence Mining District (Blackwater Mining District; Black Rock Mining District), Pinal Co., Arizona, USA
 
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