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Biotite from
Frøyså 01 Feldspar Quarry, Frøyså, Iveland, Agder, Norway


Locality type:Quarry
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Comments:Large sheets > 1 sq.m, but also nicely developed smaller crystals up to minimum 5 cm.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Frøyså 01 Feldspar Quarry, Frøyså, Iveland, Agder, Norway
Data Identifiers
Mindat Occurrence Record ID:540690
Long-form Identifier:1:3:540690:6
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.0km (0.0 miles) ⓘFrøyså 02 Feldspar Quarry, Frøyså, Iveland, Agder, Norway
0.0km (0.0 miles) ⓘFrøyså 04 Feldspar Quarry, Frøyså, Iveland, Agder, Norway
0.1km (0.0 miles) ⓘFrøyså 03 Feldspar Quarry, Frøyså, Iveland, Agder, Norway
0.3km (0.2 miles) ⓘFrøyså 14 Feldspar Prospect, Frøyså, Iveland, Agder, Norway
0.4km (0.3 miles) ⓘFrøyså 06 Feldspar Quarry, Frøyså, Iveland, Agder, Norway
0.5km (0.3 miles) ⓘDalane 2 Feldspar Quarry (Bjarne Dalane's Gruve), Dalane, Iveland, Agder, Norway
0.5km (0.3 miles) ⓘFrøysååsen 5 Feldspar Quarry, Frøysååsen, Frøyså, Iveland, Agder, Norway
0.8km (0.5 miles) ⓘDalane 5 Feldspar Quarry, Dalane, Iveland, Agder, Norway
0.8km (0.5 miles) ⓘDalane 1 Feldspar Quarry, Dalane, Iveland, Agder, Norway
0.9km (0.5 miles) ⓘFrøyså 05 Feldspar Quarry, Frøyså, Iveland, Agder, Norway
References
Bjørlykke, Knut (1935) The mineral paragenesis and classification of the granite pegmatites of Iveland, Setesdal, Southern Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 14 (3-4). 211-311
 
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