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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Gaidonnayite from
Narssârssuk pegmatite, Narsaarsuk Plateau, Igaliku, Kujalleq, Greenland


Locality type:Pegmatite
Classification
Species:Gaidonnayite
Formula:Na2Zr(Si3O9) · 2H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gaidonnayite data
Locality Data:Click here to view Narssârssuk pegmatite, Narsaarsuk Plateau, Igaliku, Kujalleq, Greenland
Data Identifiers
Mindat Occurrence Record ID:134308
Long-form Identifier:1:3:134308:3
GUID (UUID V4):0
References
Gordon, S.G. (1924): Minerals obtained in Greenland on the second Academy-Vaux expedition, 1923. Proceedings of the Academy of Natural Sciences of Philadelphia. 76, 249-268.
Mandarino, J.A., Sturman, B.D. (1978) The identity of α-catapleiite and gaidonnayite. The Canadian Mineralogist: 16: 195-198.
 
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