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
Environment:
Crystals in a pegmatite. Dimorphous with magnesioholmquistite, forms a series with clinohomquistite and ferroclinoholmquistite.
IMA Status:
Approved IMA
Locality:
Unspecifed locality in Siberia, Russia.
Name Origin:
Named for its composition, monoclinic crystal structure, and relationship with holmsquisite.
Physical Properties:
Cleavage:
[???] Good
Color:
blue violet, gray, gray violet, or light blue.
Density:
3.02
Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., ,
Hardness:
5-6 - Between Apatite and Orthoclase
More details...