| 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 Guélet ar C'hoat, Plouguin, Brest, Finistère, Brittany, France |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 1027245 |
| Long-form Identifier: | 1:3:1027245:7 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Biotite |
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| 10.3km (6.4 miles) | ⓘWrac'h island, Lilia, Plouguerneau, Brest, Finistère, Brittany, France |
| 13.9km (8.6 miles) | ⓘToullouarn quarry, Guissény, Brest, Finistère, Brittany, France |
| 16.4km (10.2 miles) | ⓘRocher du Crapaud beach alluvials, Lanildut, Brest, Finistère, Brittany, France |
| 19.2km (11.9 miles) | ⓘSaint-Egarec beach alluvials, Kerlouan, Brest, Finistère, Brittany, France |
| 21.0km (13.1 miles) | ⓘTrégana beach alluvials, Trégana, Locmaria-Plouzané, Brest, Finistère, Brittany, France |
| 21.1km (13.1 miles) | ⓘRuscumunoc beach alluvial deposits, Ruscumunoc, Plouarzel, Brest, Finistère, Brittany, France |
| 23.2km (14.4 miles) | ⓘBlancs Sablons beach alluvials, Le Conquet, Brest, Finistère, Brittany, France |
| 40.4km (25.1 miles) | ⓘPenn ar Roc'h - Porz an Ejen area, Ushant, Brest, Finistère, Brittany, France |
| 49.9km (31.0 miles) | ⓘPoul Morvan beach alluvials, Callot island, Carantec, Morlaix, Finistère, Brittany, France |
| 50.2km (31.2 miles) | ⓘPenn ar Waremm beach alluvials, Callot island, Carantec, Morlaix, Finistère, Brittany, France |
| References |
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