| 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 |
| Associated Minerals Based on Photo Data: |
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| Torbernite | 1 |
| Data |
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| Mineral Data: | Click here to view Biotite data |
| Locality Data: | Click here to view Assunção Mine, Aldeia Nova, Ferreira de Aves, Sátão, Viseu, Portugal |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 220197 |
| Long-form Identifier: | 1:3:220197:9 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Biotite |
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| 3.3km (2.1 miles) | ⓘVigia Mine, U.F. Aguiar da Beira e Coruche, Aguiar da Beira, Guarda, Portugal |
| 5.6km (3.5 miles) | ⓘRatoeira quarry, U.F. Sequeiros e Gradiz, Aguiar da Beira, Guarda, Portugal |
| 6.1km (3.8 miles) | ⓘFonte Limeira quarry, U.F Romãs Decermilo e Vila Longa, Sátão, Viseu, Portugal |
| 6.3km (3.9 miles) | ⓘRatoeira No. 1 quarry, U.F. Sequeiros e Gradiz, Aguiar da Beira, Guarda, Portugal |
| 12.2km (7.6 miles) | ⓘVenturinha, Sezures, Penalva do Castelo, Viseu, Portugal |
| 20.9km (13.0 miles) | ⓘVila Seca Mine, Vila Seca, Tavares (Chãs; Várzea e Travanca), Mangualde, Viseu, Portugal |
| 25.2km (15.6 miles) | ⓘRegada, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal |
| 28.0km (17.4 miles) | ⓘRochel, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal |
| 28.1km (17.5 miles) | ⓘChão do Castanheiro, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal |
| 28.5km (17.7 miles) | ⓘCubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal |
| References |
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Assunção Mine, Aldeia Nova, Ferreira de Aves, Sátão, Viseu, Portugal