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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Douglasite from
Douglashall I-II potash mine, Westeregeln, Börde-Hakel, Salzlandkreis, Saxony-Anhalt, Germany


Locality type:Mine
Classification
Species:Douglasite
Formula:K2[Fe2+Cl4(OH2)2]
Confirmation
Validity:Valid - Type Locality
Data
Mineral Data:Click here to view Douglasite data
Locality Data:Click here to view Douglashall I-II potash mine, Westeregeln, Börde-Hakel, Salzlandkreis, Saxony-Anhalt, Germany
Data Identifiers
Mindat Occurrence Record ID:4669
Long-form Identifier:1:3:4669:5
GUID (UUID V4):0
References
Precht, H. (1880) Ueber die Bildung des Wasserstoffs in den Stassfurter Kalisalzbergwerken. Berichte der deutschen chemischen Gesellschaft, 13 (2) 2326-2328 doi:10.1002/cber.188001302262
 
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