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Biotite from
Segura Mines (Segura mining field), União de Freg de Segura e Zebreira, Idanha-a-Nova, Castelo Branco, Portugal


Locality type:Mine
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 Segura Mines (Segura mining field), União de Freg de Segura e Zebreira, Idanha-a-Nova, Castelo Branco, Portugal
Data Identifiers
Mindat Occurrence Record ID:1514285
Long-form Identifier:1:3:1514285:0
GUID (UUID V4):1253c022-ac88-4030-8ee1-a13cd429b6c1
Nearest other occurrences of Biotite
1.3km (0.8 miles) Cerro Queimado, União de Freg de Segura e Zebreira, Idanha-a-Nova, Castelo Branco, Portugal
26.0km (16.1 miles) Granite, União de Freguesias de Monsanto e Idanha-a-Velha, Idanha-a-Nova, Castelo Branco, Portugal
36.0km (22.4 miles) São Miguel de Acha Mines, São Miguel D'acha, Idanha-a-Nova, Castelo Branco, Portugal
83.3km (51.7 miles) Cevadais occurrence, Campo Maior, Portalegre, Portugal
89.9km (55.9 miles) Cabeço de Vide ultramafic complex, Alter do Chão, Portalegre, Portugal
91.7km (57.0 miles) D. João quarry (Herdade do Padre João), Monforte, Monforte, Portalegre, Portugal
References
 
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