Vote for your favorite mineral in #MinCup26! - Monazite-(Ce) vs. Andalusite
It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Biotite from
Eastern contact zone, Bayan Obo deposit, Bayan Obo mining district, Baotou City, 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 Eastern contact zone, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
Data Identifiers
Mindat Occurrence Record ID:1979112
Long-form Identifier:1:3:1979112:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
3.1km (1.9 miles) ⓘEast Mine, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
3.6km (2.3 miles) ⓘHuanghuatan Cu-Ni-Pt-Pd deposit, Wuchuan County, Hohhot City (Huhehaote Prefecture), Inner Mongolia, China
3.7km (2.3 miles) ⓘSain Usu Au deposit (Saiwusu Au deposit), Darhan Muminggan United Banner (Da'erhan Maoming'an Lianheqi; Damaoqi), Baotou City, Inner Mongolia, China
3.8km (2.4 miles) ⓘH9 litho-unit, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
4.3km (2.7 miles) ⓘBayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
4.5km (2.8 miles) ⓘMain pit, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
9.0km (5.6 miles) ⓘAbandoned pit, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
12.1km (7.5 miles) ⓘWest Mine, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
22.0km (13.7 miles) ⓘXiaonanshan Cu-Ni-(Pt-Pd) deposit, Wuchuan County, Hohhot City (Huhehaote Prefecture), Inner Mongolia, China
56.1km (34.9 miles) ⓘLaoyanghao Au deposit, Guyang County, Baotou City, Inner Mongolia, China
References
Yang, Bo; Xue, Yuan; Yang, Li; Sun, Ningyue; Li, Guowu; Yu, Junfang; Yan, Guoying; Liu, Jianyong; Zhao, Yonggang; Meng, Wenxiang; et al. (2026) Xianhuaite-(Ce), K 2 CeNb 5 O 15 , a new niobium mineral from the Bayan Obo deposit, China. European Journal of Mineralogy, 38 (4). p.449-459. doi:10.5194/ejm-38-449-2026
 
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