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Biotite from
Tatsurido, Kakunan-myon, Kimchaek city, North Hamgyong Province, North Korea


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:(altered, perhaps to vermiculite or a chlorite?)
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Tatsurido, Kakunan-myon, Kimchaek city, North Hamgyong Province, North Korea
Data Identifiers
Mindat Occurrence Record ID:841994
Long-form Identifier:1:3:841994:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
20.2km (12.6 miles) ⓘSsangryong carbonatites, Kimchaek city, North Hamgyong Province, North Korea
37.2km (23.1 miles) ⓘSangnong Mine, Sangnong worker's district, Hochon county, South Hamgyong Province, North Korea
52.2km (32.4 miles) ⓘSochon intrusion, Tanchon City, South Hamgyong Province, North Korea
68.4km (42.5 miles) ⓘKilchu-Mongshon Volcanic Field, Myonggan County, North Hamgyong Province, North Korea
References
Field collected around the time of WW2 by Otokichi Nagashima (after whom nagashimalite was named).
 
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