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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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Ascanite

A synonym of 'Askanite'
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Formula:
(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Synonym:
A synonym of Askanite
This page provides mineralogical data about Ascanite.


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Unique IdentifiersHide

Mindat ID:
7608 (as Ascanite)
392 (as Askanite)
2821 (as Montmorillonite)
Long-form identifier:
mindat:1:1:7608:7 (as Ascanite)
mindat:1:1:392:4 (as Askanite)
mindat:1:1:2821:5 (as Montmorillonite)

Similar NamesHide

ArcaniteA valid IMA mineral speciesK2SO4
Ashanite(Nb,Ta,U,Fe,Mn)4O8
AsmaniteA synonym of Tridymite

Internet Links for AscaniteHide

References for AscaniteHide

Reference List:
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