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
Salzstiegel house, Kleinfeistritz, Weißkirchen in Steiermark, Murtal District, Styria, 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 Salzstiegel house, Kleinfeistritz, Weißkirchen in Steiermark, Murtal District, Styria, Austria
Data Identifiers
Mindat Occurrence Record ID:709182
Long-form Identifier:1:3:709182:7
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.9km (1.1 miles) ⓘSamer, Kothgraben (Kotgraben), Kleinfeistritz, Weißkirchen in Steiermark, Murtal District, Styria, Austria
7.6km (4.7 miles) ⓘLeucophyllite mine, Kothgraben (Kotgraben), Kleinfeistritz, Weißkirchen in Steiermark, Murtal District, Styria, Austria
13.9km (8.6 miles) ⓘStaller Quarry, Kathal in Obdachegg, Obdachegg, Obdach, Murtal District, Styria, Austria
14.9km (9.3 miles) ⓘA2 motorway tunnel (Kalcherkogel tunnel), Kalcherkogel, Packsattel, Preitenegg, Wolfsberg District, Carinthia, Austria
16.0km (10.0 miles) ⓘHematite Mine, Waldenstein, Wolfsberg, Wolfsberg District, Carinthia, Austria
19.0km (11.8 miles) ⓘA2 motorway tunnel (Herzogberg tunnel), Herzogberg, Modriach, Edelschrott, Voitsberg District, Styria, Austria
22.6km (14.0 miles) ⓘKamperkogel, Frantschach-Sankt Gertraud, Wolfsberg District, Carinthia, Austria
26.4km (16.4 miles) ⓘSankt Martin am Silberberg, Hüttenberg, Sankt Veit an der Glan District, Carinthia, Austria
27.5km (17.1 miles) ⓘSpodumene prospect, Brandrücken, Frantschach-Sankt Gertraud, Wolfsberg District, Carinthia, Austria
27.9km (17.4 miles) ⓘPlankogel, Knappenberg, Hüttenberger Erzberg, Hüttenberg, Sankt Veit an der Glan District, Carinthia, Austria
References
Steir.Mineralog 25/2011, p.11-14.
 
and/or  
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