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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Tweddillite from
Kamisugai mine, Ouzu City, Ehime Prefecture, Japan


Locality type:Mine
Classification
Species:Tweddillite
Formula:(CaSr)(Mn3+AlMn3+)O[Si2O7][SiO4](OH)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tweddillite data
Locality Data:Click here to view Kamisugai mine, Ouzu City, Ehime Prefecture, Japan
Data Identifiers
Mindat Occurrence Record ID:435552
Long-form Identifier:1:3:435552:6
GUID (UUID V4):0
References
Fukushima, H., Minakawa, T. & Nishio, D. (2005): Ba-rich tweddillite from the Kamisugai mine in the Sambagawa metamorphic belt, Shikoku, Japan. Ganseki Kobutsu Kagaku 34, 69-76. (in Japanese)
 
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