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Biotite from
Yzeron, Lyon, Rhône, Auvergne-Rhône-Alpes, France

Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
References
References:Belot, Victor R. (1978) Guide des minéraux, coquillages et fossiles: où les trouver en France, comment les reconnaître et les collectionner (Guides Horay). Pierre Horay (Ed.), 224 pp.
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Yzeron, Lyon, Rhône, Auvergne-Rhône-Alpes, France
Nearest other occurrences of Biotite
13.0km (8.1 miles) Saint-Symphorien-sur-Coise quarry, Chazelles-sur-Lyon, Lyon, Rhône, Auvergne-Rhône-Alpes, France
13.3km (8.3 miles) Bellevue quarry, Montagny, Brignais, Lyon, Rhône, Auvergne-Rhône-Alpes, France
19.2km (11.9 miles) Quai Saint Vincent, First District, Lyon, Rhône, Auvergne-Rhône-Alpes, France
21.0km (13.1 miles) Chessy copper mines, Chessy-les-Mines, Villefranche, Rhône, Auvergne-Rhône-Alpes, France
27.6km (17.1 miles) Peymartin, La Tour-en-Jarez, Saint-Etienne, Loire, Auvergne-Rhône-Alpes, France
29.9km (18.6 miles) L'Hermitage, Saint-Chamond, Loire, Auvergne-Rhône-Alpes, France
71.3km (44.3 miles) Charrier Mine, Laprugne, Le Mayet-de-Montagne, Allier, Auvergne-Rhône-Alpes, France
78.2km (48.6 miles) Domange, Igé, Mâcon, Saône-et-Loire, Bourgogne-Franche-Comté, France
86.2km (53.6 miles) Chardas, Allègre, Haute-Loire, Auvergne-Rhône-Alpes, France
88.4km (54.9 miles) Dore river alluvials, Dorat, Thiers, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
 
Mineral and/or Locality  
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