Wenkite

General Information:
 Chemical Formula:
Ba4Ca6(Si,Al)20O39(OH)2(SO4)3·n(H2O) (?)
 IMA Status:
Approved IMA 1962
Physical Properties:
 Cleavage:
[???] Indistinct
 Color:
light gray.
 Density:
3.13
 Diaphaniety:
Transparent to Translucent
 Hardness:
6 - Orthoclase
 Luster:
Vitreous (Glassy)
 Streak:
white
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