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Biotite from
Nagatoro, Chichibu District, Saitama Prefecture, Japan


Locality type:Town
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 Nagatoro, Chichibu District, Saitama Prefecture, Japan
Data Identifiers
Mindat Occurrence Record ID:2030945
Long-form Identifier:1:3:2030945:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
28.5km (17.7 miles) ⓘChichibu mining district, Nakatsugawa, Ohtaki-mura, Chichibu City, Saitama Prefecture, Japan
References
Yano, Moei; Yasukawa, Kazutaka; Nozaki, Tatsuo; Fujinaga, Koichiro; Ogasawara, Mitsuki; Nakamura, Kentaro; Iwamori, Hikaru; Kato, Yasuhiro (2027) Geochemistry of hematite-quartz schist in the Sanbagawa metamorphic belt, Japan: A metamorphosed umber deposit. Journal of Geochemical Exploration, 292. p.108246. doi:10.1016/j.gexplo.2026.108246
 
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