Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Biotite from
Maier feldspar mine, Püllersreuth, Kirchendemenreuth, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany


Locality type:Mine
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Maier feldspar mine, Püllersreuth, Kirchendemenreuth, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
Data Identifiers
Mindat Occurrence Record ID:102411
Long-form Identifier:1:3:102411:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
3.2km (2.0 miles) ⓘWilma Mine, Wendersreuth, Kirchendemenreuth, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
3.8km (2.4 miles) ⓘOberbaumühle Quarry, Oberbaumühle, Windischeschenbach, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
3.8km (2.4 miles) ⓘKTB borehole (KTB pilot hole), Windischeschenbach, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
8.5km (5.3 miles) ⓘPlößberg-Wildenau pegmatite, Plößberg, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
8.6km (5.3 miles) ⓘLindner Mine, Plößberg-Wildenau pegmatite, Plößberg, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
16.3km (10.1 miles) ⓘBasalt works, Triebendorf, Wiesau, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
17.1km (10.6 miles) ⓘScharnagl Quarry, Oedenthal, Weiden in der Oberpfalz, Upper Palatinate, Bavaria, Germany
19.5km (12.1 miles) ⓘGroßer Teichelberg (Teichelberg; Teichlberg), Pechbrunn, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
23.6km (14.7 miles) ⓘAhornberg, Bärnau, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
23.8km (14.8 miles) ⓘSteinach, Leuchtenberg, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
References
Weiß, Stefan (1990) Mineralfundstellen Atlas Deutschland West. Christian Weise Verlag, Munich, Germany. 320pp.
Lindhardt, Elmar (2000) Historischer Mineralfundpunkt in der Oberpfalz: Der Beryllpegmatit der Feldspatgrube Maier, Püllersreuth [Historic mineral site in the Upper Palatinate: The beryl pegmatite of the Maier feldspar mine, Püllersreuth]. Lapis, 25 (3). 13-23; 50
 
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