| Locality type: | Civil Parish |
| 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 Arreigada, Paços de Ferreira, Porto, Portugal |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 223295 |
| Long-form Identifier: | 1:3:223295:9 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Biotite |
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| 43.6km (27.1 miles) | ⓘFreita Mountain, Albergaria da Serra, Arouca, Aveiro, Portugal |
| 45.1km (28.0 miles) | ⓘCastanheira, Albergaria da Serra, Cabreiros e Albergaria da Serra, Arouca, Aveiro, Portugal |
| 46.5km (28.9 miles) | ⓘRegoufe Mines, Covelo de Paivó, Arouca, Aveiro, Portugal |
| 51.4km (31.9 miles) | ⓘLamas de Olo pluton, Vila Marim, Vila Real, Vila Real, Portugal |
| 51.5km (32.0 miles) | ⓘMonte de Entre-Portelas Mine (S. João Mine; Adoria Mine), Cerva e Limões, Ribeira de Pena, Vila Real, Portugal |
| 57.4km (35.7 miles) | ⓘBorralha Mines, Salto, Montalegre, Vila Real, Portugal |
| 59.0km (36.7 miles) | ⓘMonte do Castelo da Pena Mine, Vila Chã (São João Baptista e Santiago), Ponte da Barca, Viana do Castelo, Portugal |
| 59.6km (37.0 miles) | ⓘMata da Galinheira Mine, Vila Chã (São João Baptista e Santiago), Ponte da Barca, Viana do Castelo, Portugal |
| 64.6km (40.1 miles) | ⓘCabanas Mine, Arcozelo, Ponte de Lima, Viana do Castelo, Portugal |
| 65.3km (40.6 miles) | ⓘBorrageiro Mine, Cabril, Montalegre, Vila Real, Portugal |
| References |
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