Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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UM1985-29-SiO:FeU from
Bulgaria


Locality type:Country
Classification
Species:'UM1985-29-SiO:FeU' (not an IMA approved species)
Formula:U4Fe5Si4O21
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view UM1985-29-SiO:FeU data
Locality Data:Click here to view Bulgaria
Data Identifiers
Mindat Occurrence Record ID:976452
Long-form Identifier:1:3:976452:1
GUID (UUID V4):0
References
Simova, F.G. (1985): Uranium-iron-silicate phases from the Balkan metallogenic zone and the Lenz im Kaltenegg (Styria, Austria) deposit. Doklady Bolg. Akad. Nauk: 38: 1171-1174.
Jambor, John L.; Bladh, Kenneth W.; Ercit, T. Scott; Grice, Joel D.; Grew, Edward S. (1988) New mineral names. American Mineralogist, 73 (7-8). 927-935
 
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