| Locality type: | Mountain |
| 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 Freita Mountain, Albergaria da Serra, Arouca, Aveiro, Portugal |
| Photo Gallery | View Gallery (10 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 259207 |
| Long-form Identifier: | 1:3:259207:7 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Biotite |
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| 2.3km (1.4 miles) | ⓘCastanheira, Albergaria da Serra, Cabreiros e Albergaria da Serra, Arouca, Aveiro, Portugal |
| 11.1km (6.9 miles) | ⓘRegoufe Mines, Covelo de Paivó, Arouca, Aveiro, Portugal |
| 26.0km (16.2 miles) | ⓘBejanca Mine (Carvalhal do Estanho), Queirã, Vouzela, Viseu, Portugal |
| 30.7km (19.1 miles) | ⓘSeixos Alvos Mine, U.F Couto de Cima e Couto de Baixo, Viseu, Viseu, Portugal |
| 47.1km (29.3 miles) | ⓘPicoto Mine, Vilar Seco, Nelas, Viseu, Portugal |
| 49.7km (30.9 miles) | ⓘRegada, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal |
| 52.5km (32.6 miles) | ⓘCubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal |
| 53.5km (33.2 miles) | ⓘChão do Castanheiro, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal |
| 53.5km (33.3 miles) | ⓘRochel, Cubos-Mesquitela-Mangualde area, Mangualde (Mesquitela e Cunha Alta), Mangualde, Viseu, Portugal |
| 53.8km (33.4 miles) | ⓘAssunção Mine, Aldeia Nova, Ferreira de Aves, Sátão, Viseu, Portugal |
| References |
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Freita Mountain, Albergaria da Serra, Arouca, Aveiro, Portugal