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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Heidornite from
Frenswegen 3 deep bore, Frenswegen, Nordhorn, County of Bentheim District, Lower Saxony, Germany


02102720017369408914682.jpg
Heidornite, etc.

Frenswegen 3 deep bore, Frenswegen, Nordhorn, County of Bentheim District, Lower Saxony, Germany
06947960017369408912297.jpg
Heidornite

Frenswegen 3 deep bore, Frenswegen, Nordhorn, County of Bentheim District, Lower Saxony, Germany
04799040017271999261924.jpg
Heidornite, etc.

Frenswegen 3 deep bore, Frenswegen, Nordhorn, County of Bentheim District, Lower Saxony, Germany
09481260017271923717646.jpg
Heidornite

Frenswegen 3 deep bore, Frenswegen, Nordhorn, County of Bentheim District, Lower Saxony, Germany
04799040017271999261924.jpg
Heidornite, etc.

Frenswegen 3 deep bore, Frenswegen, Nordhorn, County of Bentheim District, Lower Saxony, Germany
09481260017271923717646.jpg
Heidornite

Frenswegen 3 deep bore, Frenswegen, Nordhorn, County of Bentheim District, Lower Saxony, Germany
Locality type:Borehole
Classification
Species:Heidornite
Formula:Na2Ca3B5O8(SO4)2Cl(OH)2
Confirmation
Validity:Valid - Type Locality
Associated Minerals Based on Photo Data:
Anhydrite1
Glauberite1
Data
Mineral Data:Click here to view Heidornite data
Locality Data:Click here to view Frenswegen 3 deep bore, Frenswegen, Nordhorn, County of Bentheim District, Lower Saxony, Germany
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:6067
Long-form Identifier:1:3:6067:7
GUID (UUID V4):0
References
Engelhardt, Wolf, Füchtbauer, Hans, Zemann, Josef (1956) Heidornit Na2Ca3[Cl · (SO4)2 · B5O8(OH)2] ein neues Bormineral aus dem Zechsteinanhydrit. Mit einer röntgenographischen Untersuchung. Heidelberger Beiträge zur Mineralogie und Petrographie, 5 (3). 177-186 doi:10.1007/bf01104156
 
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