Pleochroism
Very strong: pale yellow colorless
-
Transparency
Transparent
TranslucentWalter Schumann
Refractive Index
1.614-1.666
1.530-1.540
Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
-
Birefringence
0.014-0.032
0.004
Clarity
Transparent
TranslucentWalter Schumann