Yugawaralite

General Information:
 Chemical Formula:
CaAl2Si6O16·4(H2O)
 Composition:
(Molecular Weight = 590.61 gm)
Calcium 6.79 % Ca
Aluminum 9.14 % Al
Silicon 28.53 % Si
Hydrogen 1.37 % H 
Oxygen 54.18 % O 
 Empirical Formula:
CaAl2Si6O16·4(H2O)
 IMA Status:
Approved IMA
Physical Properties:
 Cleavage:
[010] Indistinct
 Color:
colorless or white.
 Density:
2.23
 Diaphaniety:
Transparent
 Hardness:
4.5 - Between Fluorite and Apatite
 Luster:
Vitreous (Glassy)
 Streak:
white
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