Locality type: | Mine |
Classification |
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Species: | 'Biotite' (not an IMA approved species) |
Formula: | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Confirmation |
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Validity: | Confirmed |
Confirmation Methods: | Visually Identified |
Data |
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Mineral Data: | Click here to view Biotite data |
Locality Data: | Click here to view São Miguel de Acha Mines, São Miguel D'acha, Idanha-a-Nova, Castelo Branco, Portugal |
Data Identifiers |
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Mindat Occurrence Record ID: | 855287 |
Long-form Identifier: | 1:3:855287:7 |
GUID (UUID V4): | 730d3f4d-fbb8-439b-a991-26aa4913b203 |
Nearest other occurrences of Biotite |
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17.8km (11.1 miles) | ⓘGranite, União de Freguesias de Monsanto e Idanha-a-Velha, Idanha-a-Nova, Castelo Branco, Portugal |
36.0km (22.4 miles) | ⓘSegura Mines (Segura mining field), União de Freg de Segura e Zebreira, Idanha-a-Nova, Castelo Branco, Portugal |
37.0km (23.0 miles) | ⓘCerro Queimado, União de Freg de Segura e Zebreira, Idanha-a-Nova, Castelo Branco, Portugal |
73.1km (45.4 miles) | ⓘVila Seca Mine, Vila Seca, Tavares (Chãs; Várzea e Travanca), Mangualde, Viseu, Portugal |
73.2km (45.5 miles) | ⓘRochel, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal |
73.3km (45.5 miles) | ⓘChão do Castanheiro, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal |
73.9km (45.9 miles) | ⓘCubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal |
77.1km (47.9 miles) | ⓘPicoto Mine, Vilar Seco, Nelas, Viseu, Portugal |
77.6km (48.2 miles) | ⓘRegada, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal |
82.6km (51.3 miles) | ⓘVenturinha, Sezures, Penalva do Castelo, Viseu, Portugal |
References |
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