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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Eckermannite from
Tanohata mine, Tanohata, Shimohei District, Iwate Prefecture, Japan


Locality type:Mine
Classification
Species:Eckermannite
Formula:NaNa2(Mg4Al}Si8O22(OH)2
Comments:Need to be checked if it can be assigned to eckermannite according to the redefinition by IMA (IMA2013-136).
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Eckermannite data
Locality Data:Click here to view Tanohata mine, Tanohata, Shimohei District, Iwate Prefecture, Japan
Data Identifiers
Mindat Occurrence Record ID:677187
Long-form Identifier:1:3:677187:4
GUID (UUID V4):0
References
(n.d.) Dr. Matsuo Nambu collection, Geological Survey of Japan.
 
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