General Information:
Chemical Formula:
(K,Na)Ca2[Mg3(Al,Fe+++)2][Si5Al3O22](OH)2
Composition:
(Molecular Weight = 872.23 gm)
Potassium 3.36 % K
Sodium 0.66 % Na
Calcium 9.19 % Ca
Magnesium 8.36 % Mg
Aluminum 10.05 % Al
Iron 4.80 % Fe
Silicon 19.32 % Si
Hydrogen 0.23 % H
Oxygen 44.02 % O
Empirical Formula:
K0.75Na0.25Ca2Mg3Al1.25Fe3+0.75(Si6Al2O22)(OH)2
IMA Status:
Proposed IMA (Dana # Added)
Name Origin:
Named for the composition and for Ryoichi Sadanaga (1920-), professor emeritus, University of Tokyo.
More details...