Luster
Vitreous, Pearly
-
Pleochroism
-
-
Dispersion
0.020.19
0.005
1
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Transparency
-
Translucent
Refractive Index
1.653-1.693-9999
1
3.25
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Optic Character
-
-
Crystal System
monoclinic
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Birefringence
0.038-0.044-9999
0
0.296
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Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent