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Biotite from
Pacoima Canyon pegmatite locality (Pacoima Canyon Allanite pegmatite; Allanite locality), Pacoima Canyon, San Gabriel Mts, Los Angeles Co., California, USA

Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Comments:Occurs as crystals 15 cm x 1.5 meters.
Confirmation
Validity:Believed Valid
References
References:Rocks & Minerals (1955): 30(5-6): 237-246; Neuerberg, George Joseph (1954), Allanite pegmatite, San Gabriel Mountains, Los Angeles County, California: American Mineralogist: 39: 832; Hoda, S.N. and Hood (1972): 343; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 428.
Associated Minerals Based on Photo Data:
Fluorapatite1 photo of Biotite associated with Fluorapatite at this locality.
Quartz1 photo of Biotite associated with Quartz at this locality.
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Pacoima Canyon pegmatite locality (Pacoima Canyon Allanite pegmatite; Allanite locality), Pacoima Canyon, San Gabriel Mts, Los Angeles Co., California, USA
Nearest other occurrences of Biotite
65.6km (40.7 miles) Unnamed abandoned quarry (Unnamed small gravel quarry), Claremont, San Gabriel Mts, Los Angeles Co., California, USA
93.0km (57.8 miles) Unnamed Vermiculite occurrence [1], La Sierra, Riverside, Riverside Co., California, USA
94.7km (58.8 miles) Jensen Quarry (Oak Quarry), Jurupa Mts, Jurupa Valley, Riverside Co., California, USA
98.8km (61.4 miles) Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
99.8km (62.0 miles) Kramer Borate deposit, Boron, Kern Co., California, USA
99.9km (62.1 miles) Mudd Mine (Western Mine; Western shaft), West Baker, Kramer Borate deposit, Boron, Kern Co., California, USA
 
Mineral and/or Locality  
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