Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Biotite from
Route 5A roadcuts, Westmore, Orleans County, Vermont, USA


Locality type:Road Cutting
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 Route 5A roadcuts, Westmore, Orleans County, Vermont, USA
Data Identifiers
Mindat Occurrence Record ID:127973
Long-form Identifier:1:3:127973:3
GUID (UUID V4):0
References
Rocks & Minerals (1996): Vol. 71.
 
and/or  
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