General Information:
Chemical Formula:
(Na,K)6(Mn++,Fe++)3Si9O24·6(H2O)
Composition:
(Molecular Weight = 1,080.50 gm)
Potassium 7.24 % K
Sodium 8.51 % Na
Manganese 11.44 % Mn
Iron 3.88 % Fe
Silicon 23.39 % Si
Hydrogen 1.12 % H
Oxygen 44.42 % O
Empirical Formula:
Na4K2Mn2+2.25Fe2+0.75Si9O24·6(H2O)
IMA Status:
Approved IMA 1982
Physical Properties:
Color:
yellow green, yellow orange, or olive green.
Density:
2.78
Hardness:
2-3 - Gypsum-Calcite
Streak:
greenish white
More details...