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Biotite from
Leilenkopf, Brohl-Lützing, Bad Breisig, Ahrweiler District, Rhineland-Palatinate, Germany

Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Confirmation
Validity:Believed Valid
References
References:Brauns, R., Die Mineralien der Niederrheinischen Vulkangebiete, Schweizerbart, Stuttgart, 1922
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Leilenkopf, Brohl-Lützing, Bad Breisig, Ahrweiler District, Rhineland-Palatinate, Germany
Nearest other occurrences of Biotite
3.4km (2.1 miles) Herchenberg, Burgbrohl, Brohltal, Ahrweiler District, Rhineland-Palatinate, Germany
4.0km (2.5 miles) Kunkskopf, Wassenach, Brohltal, Ahrweiler District, Rhineland-Palatinate, Germany
6.1km (3.8 miles) Veitskopf, Wassenach, Brohltal, Ahrweiler District, Rhineland-Palatinate, Germany
6.3km (3.9 miles) Nickenicher Sattel (Eicher Sattel), Nickenich, Pellenz, Mayen-Koblenz District, Rhineland-Palatinate, Germany
7.3km (4.5 miles) Gleeser Felder, Glees, Brohltal, Ahrweiler District, Rhineland-Palatinate, Germany
7.4km (4.6 miles) Lorenzfelsen, Nickenich, Pellenz, Mayen-Koblenz District, Rhineland-Palatinate, Germany
7.8km (4.8 miles) Hüttenberg, Glees, Brohltal, Ahrweiler District, Rhineland-Palatinate, Germany
8.4km (5.2 miles) Nickenicher Weinberg (Nickenicher Sattelberg), Nickenich, Pellenz, Mayen-Koblenz District, Rhineland-Palatinate, Germany
9.1km (5.7 miles) Krufter Ofen, Kruft, Pellenz, Mayen-Koblenz District, Rhineland-Palatinate, Germany
9.6km (5.9 miles) In den Dellen quarries, Mendig, Mendig, Mayen-Koblenz District, Rhineland-Palatinate, Germany
 
Mineral and/or Locality  
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