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Dominant species
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Margarite
Chemical
Formula
CaAl2(Al2Si2)O10(OH)2
Species
Silicates
Crystal
System
Monoclinic
Mohs
Scale
4
Refractive
Index
n = 1.595 - 1.638 n = 1.625 - 1.648 n = 1.627 - 1.650
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