| 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: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Biotite data |
| Locality Data: | Click here to view Herdade do Ferragudo Mine, Castro Verde e Casével, Castro Verde, Beja, Portugal |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 1676830 |
| Long-form Identifier: | 1:3:1676830:9 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Biotite |
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| 5.5km (3.4 miles) | ⓘPorteirinhos Mine, Almodôvar e Graça dos Padrões, Almodôvar, Beja, Portugal |
| 7.5km (4.7 miles) | ⓘCerro do Algaré Mine, Almodôvar e Graça dos Padrões, Almodôvar, Beja, Portugal |
| 10.1km (6.3 miles) | ⓘBrancanes Mine, Brancanes, Almodôvar e Graça dos Padrões, Almodôvar, Beja, Portugal |
| 18.5km (11.5 miles) | ⓘBarrigão Mine, Santa Cruz, Almodôvar, Beja, Portugal |
| 30.2km (18.8 miles) | ⓘFerrarias e Castelo Mine, Santa Vitória e Mombeja, Beja, Beja, Portugal |
| 54.3km (33.7 miles) | ⓘLousal Mine, Azinheira dos Barros, Grândola, Setúbal, Portugal |
| 58.0km (36.1 miles) | ⓘPalmeira No. 2 quarry, Monchique, Monchique, Faro, Portugal |
| 99.3km (61.7 miles) | ⓘBarrocal quarries, Nossa Senhora da Tourega e Nossa Senhora de Guadalupe, Évora, Évora, Portugal |
| References |
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