General Information:
Chemical Formula:
NaMg7Si8O22(OH)2
Composition:
(Molecular Weight = 803.81 gm)
Sodium 2.86 % Na
Magnesium 21.17 % Mg
Silicon 27.95 % Si
Hydrogen 0.25 % H
Oxygen 47.77 % O
Empirical Formula:
NaMg7(Si8O22)(OH)2
IMA Status:
Approved IMA 1978
Name Origin:
From its compostition and from the Latin anthophyllum - "clove" in allusion to the color.
Physical Properties:
Color:
green or brown.
Hardness:
5-6 - Between Apatite and Orthoclase
More details...