Yagiite

General Information:
 Chemical Formula:
(Na,K)3Mg4(Al,Mg)6(Si,Al)24O60
 Composition:
(Molecular Weight = 1,991.71 gm)
Potassium 1.47 % K 
Sodium 2.60 % Na
Magnesium 7.93 % Mg
Aluminum 9.48 % Al
Silicon 30.32 % Si
Oxygen 48.20 % O 
 Empirical Formula:
Na2.25K0.75Mg4Al4.5Mg2.5Si21.5Al2.5O60
 IMA Status:
Approved IMA 1969
Physical Properties:
 Color:
colorless.
 Density:
2.7
 Diaphaniety:
Transparent
 Hardness:
5-6 - Between Apatite and Orthoclase
 Luster:
Vitreous (Glassy)
 Streak:
white
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