Diaoyudaoite

General Information:
 Chemical Formula:
NaAl11O17
 Composition:
(Molecular Weight = 591.78 gm)
Sodium 3.88 % Na
Aluminum 50.15 % Al
Oxygen 45.96 % O 
 Empirical Formula:
NaAl11O17
 IMA Status:
Approved IMA
Physical Properties:
 Cleavage:
[???] Good
 Color:
colorless or light green.
 Density:
3.3
 Diaphaniety:
Transparent
 Hardness:
7.6
 Luster:
Vitreous (Glassy)
 Streak:
white
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