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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Biotite from
Kung Oskar mine, Malmberget, Gällivare, Norrbotten County, Sweden


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 Kung Oskar mine, Malmberget, Gällivare, Norrbotten County, Sweden
Data Identifiers
Mindat Occurrence Record ID:918721
Long-form Identifier:1:3:918721:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.5km (0.9 miles) ⓘMalmberget, Gällivare, Norrbotten County, Sweden
9.7km (6.0 miles) ⓘNautanen North deposit, Nautanen, Gällivare, Norrbotten County, Sweden
10.0km (6.2 miles) ⓘNautanen Mine, Nautanen, Gällivare, Norrbotten County, Sweden
18.4km (11.4 miles) ⓘAitik Mine, Gällivare, Norrbotten County, Sweden
20.7km (12.8 miles) ⓘSalmijärvi, Gällivare, Norrbotten County, Sweden
20.7km (12.9 miles) ⓘLiikavaara East, Gällivare, Norrbotten County, Sweden
37.9km (23.5 miles) ⓘNunasvaara, Vittangi, Kiruna, Norrbotten County, Sweden
49.8km (31.0 miles) ⓘPainirova, Kiruna, Norrbotten County, Sweden
51.9km (32.2 miles) ⓘLeveäniemi Mine, Svappavaara, Kiruna, Norrbotten County, Sweden
59.1km (36.7 miles) ⓘPattok, Gällivare, Norrbotten County, Sweden
References
Lorin, Torbjörn, Sandström, Frej (2014) Malmbergets geologi och mineralogi. Litofilen. Medlemsblad för Västerås AmatörGeologiska Sällskap, 31 (4) 18-35
 
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