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Phengite from
Upstream from old San Francisquito dam site, San Francisquito Canyon, San Gabriel Mts, Los Angeles Co., California, USA

Classification
Species:Muscovite var: Phengite
Formula:KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Comments:Occurs as nests and lenses in talc-sericite schists of the Sierra Pelona series.
Confirmation
Validity:Believed Valid
References
References:Murdoch, Joseph & Robert W. Webb (1938), Notes on some minerals from southern California: American Mineralogist: 23: 353; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 156; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 425.
Data
Mineral Data:Click here to view Phengite data
Locality Data:Click here to view Upstream from old San Francisquito dam site, San Francisquito Canyon, San Gabriel Mts, Los Angeles Co., California, USA
Mineral and/or Locality  
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