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
Dürnberg, Ottensheim, Urfahr-Umgebung District, Upper Austria, Austria


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 Dürnberg, Ottensheim, Urfahr-Umgebung District, Upper Austria, Austria
Data Identifiers
Mindat Occurrence Record ID:768489
Long-form Identifier:1:3:768489:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
17.9km (11.1 miles) ⓘLuftenberg quarries (Steininger quarry), Luftenberg an der Donau, Perg District, Upper Austria, Austria
19.2km (11.9 miles) ⓘSteinhaus quarry (Maria-Luise quarry), Kleinzell im Mühlkreis, Rohrbach District, Upper Austria, Austria
25.8km (16.0 miles) ⓘMeitschenhof, Pregarten, Freistadt District, Upper Austria, Austria
26.4km (16.4 miles) ⓘLest, Kefermarkt, Freistadt District, Upper Austria, Austria
39.0km (24.2 miles) ⓘMoravice, Frymburk, Český Krumlov District, South Bohemian Region, Czech Republic
46.6km (29.0 miles) ⓘBlansky´les granulite massif, Světlík, Český Krumlov District, South Bohemian Region, Czech Republic
48.6km (30.2 miles) ⓘGrögöd Quarry (G'steinert Quarry), Untergriesbach, Passau District, Lower Bavaria, Bavaria, Germany
53.5km (33.3 miles) ⓘGranite quarry, Allerding, Sankt Florian am Inn, Schärding District, Upper Austria, Austria
60.7km (37.7 miles) ⓘPlešovice quarry, Plešovice, Zlatá Koruna, Český Krumlov District, South Bohemian Region, Czech Republic
61.0km (37.9 miles) ⓘPegmatite occurrences, Dolní Svince, Dolní Třebonín, Český Krumlov District, South Bohemian Region, Czech Republic
References
Erich Reiter, in: Die Mineralvorkommen Oberösterreichs anhand ihrer Literatur.
 
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