| Locality type: | Quarry |
| 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: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Biotite data |
| Locality Data: | Click here to view D. João quarry (Herdade do Padre João), Monforte, Monforte, Portalegre, Portugal |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 828396 |
| Long-form Identifier: | 1:3:828396:2 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Biotite |
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| 15.4km (9.5 miles) | ⓘCabeço de Vide ultramafic complex, Alter do Chão, Portalegre, Portugal |
| 34.1km (21.2 miles) | ⓘCevadais occurrence, Campo Maior, Portalegre, Portugal |
| 76.6km (47.6 miles) | ⓘBarrocal quarries, Nossa Senhora da Tourega e Nossa Senhora de Guadalupe, Évora, Évora, Portugal |
| 76.9km (47.8 miles) | ⓘSierra de San Pedro, Cáceres, Cáceres, Extremadura, Spain |
| 78.7km (48.9 miles) | ⓘPedras Pintas Mine, Cortiçadas de Lavre e Lavre, Montemor-o-Novo, Évora, Portugal |
| 83.9km (52.1 miles) | ⓘCasas Novas Mine, Santiago do Escoural, Montemor-o-Novo, Évora, Portugal |
| 91.7km (57.0 miles) | ⓘSegura Mines (Segura mining field), União das Freguesias de Zebreira e Segura, Idanha-a-Nova, Castelo Branco, Portugal |
| 92.3km (57.4 miles) | ⓘCerro Queimado, União das Freguesias de Zebreira e Segura, Idanha-a-Nova, Castelo Branco, Portugal |
| 93.3km (58.0 miles) | ⓘMonfurado gold prospect, São Cristóvão, Montemor-o-Novo, Évora, Portugal |
| References |
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