Manaksite

General Information:
 Chemical Formula:
KNaMn++Si4O10
 Composition:
(Molecular Weight = 389.36 gm)
Potassium 10.04 % K 
Sodium 5.90 % Na
Manganese 14.11 % Mn
Silicon 28.85 % Si
Oxygen 41.09 % O 
 Empirical Formula:
KNaMn2+Si4O10
 IMA Status:
Approved IMA
Physical Properties:
 Cleavage:
[001] Perfect, [010] Perfect
 Color:
colorless, creamy white, or rosy.
 Density:
2.73
 Diaphaniety:
Transparent to Translucent
 Hardness:
5 - Apatite
 Luster:
Vitreous (Glassy)
 Streak:
white
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