General Information:
Chemical Formula:
Li2(Mg,Fe++)3Al2Si8O22(OH)2
Composition:
(Molecular Weight = 846.07 gm)
Lithium 1.64 % Li
Aluminum 6.38 % Al
Iron 19.80 % Fe
Silicon 26.56 % Si
Hydrogen 0.24 % H
Oxygen 45.38 % O
Empirical Formula:
Li2Fe2+3Al2(Si8O22)(OH)2
IMA Status:
Approved IMA
Name Origin:
The name reflects its composition and relationship to holmquistite..
Physical Properties:
Cleavage:
[???] Good
Color:
violet or gray blue.
Hardness:
5-6 - Between Apatite and Orthoclase
More details...