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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
Tuganzhai iREE deposit, Lianghe County, Dehong, Yunnan, 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 Tuganzhai iREE deposit, Lianghe County, Dehong, Yunnan, China
Data Identifiers
Mindat Occurrence Record ID:1530862
Long-form Identifier:1:3:1530862:3
GUID (UUID V4):0
Nearest other occurrences of Biotite
4.8km (3.0 miles) ⓘTuguanzhai REE deposit, Tengchong County, Baoshan, Yunnan, China
30.0km (18.7 miles) ⓘLaopingshan Sn deposit, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
30.2km (18.8 miles) ⓘLailishan Sn deposit, Tengchong Sn belt, Lianghe County, Dehong, Yunnan, China
31.6km (19.6 miles) ⓘBaihuanao intrusion, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
37.3km (23.2 miles) ⓘXinqi Sn-W deposit, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
37.9km (23.5 miles) ⓘHuangliangou Be-Nb-Ta pegmatite deposit, Longling County, Baoshan, Yunnan, China
55.0km (34.2 miles) ⓘTieyaoshan W-Sn deposit, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
55.7km (34.6 miles) ⓘDamanbie REE deposit, Dehong, Yunnan, China
63.0km (39.2 miles) ⓘGudong Sn deposit, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
72.0km (44.7 miles) ⓘXiaolonghe Sn deposit, Tengchong Sn belt, Tengchong County, Baoshan, Yunnan, China
References
Zhu, X., Zhang, B., Ma, G., Pan, Z., Hu, Z., & Zhang, B. (2022). Mineralization of ion-adsorption type rare earth deposits in Western Yunnan, China. Ore Geology Reviews, 148, 104984.
 
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