Yoshiokaite

General Information:
 Chemical Formula:
(Ca8-(x/2)[ ](x/2)Al16-xSixO32)
 Composition:
(Molecular Weight = 1,245.37 gm)
Calcium 24.14 % Ca
Aluminum 32.50 % Al
Silicon 2.26 % Si
Oxygen 41.11 % O 
 Empirical Formula:
Ca7.5Al15SiO32
 IMA Status:
Approved IMA
Physical Properties:
 Cleavage:
[???] Indistinct
 Color:
white or colorless.
 Density:
2.76 - 2.9, Average = 2.83
 Diaphaniety:
Translucent
 Luster:
Vitreous (Glassy)
 Streak:
white
More details...