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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Biotite from
Wuhua'aobao Au deposit, Sonid Left Banner (Sunite Zuoqi), Xilingol League (Xilinguole Prefecture), Inner Mongolia, China


Locality type:Deposit
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Wuhua'aobao Au deposit, Sonid Left Banner (Sunite Zuoqi), Xilingol League (Xilinguole Prefecture), Inner Mongolia, China
Data Identifiers
Mindat Occurrence Record ID:878937
Long-form Identifier:1:3:878937:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
38.1km (23.7 miles) ⓘZhunsujihua Cu-Mo deposit (Zhunsujihua Aobao Cu-Mo deposit; Junsujha Obo Cu-Mo deposit), Sonid Left Banner (Sunite Zuoqi), Xilingol League (Xilinguole Prefecture), Inner Mongolia, China
66.4km (41.2 miles) ⓘDzamyn Uud Pluton, Erdene District, Dornogovi Province, Mongolia
72.5km (45.1 miles) ⓘWulandele Mo-Cu deposit, Sonid Left Banner (Sunite Zuoqi), Xilingol League (Xilinguole Prefecture), Inner Mongolia, China
83.5km (51.9 miles) ⓘBayinwula U deposit, Sonid Left Banner (Sunite Zuoqi), Xilingol League (Xilinguole Prefecture), Inner Mongolia, China
85.4km (53.1 miles) ⓘBaiyinula (Bayan Ul), Sonid Left Banner (Sunite Zuoqi), Xilingol League (Xilinguole Prefecture), Inner Mongolia, China
References
Chao Tang, Junqiang Chen, Xiaoxue Liu, and Zhidan Li (2013): Geology and Exploration 49(2), 224-235
 
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