The brittle mica group includes:
Anandite:
BaFe
Bityite:
CaLiAl2(Si2BeAl)O10(OH)2
Clintonite:
CaAlMg2(SiAl3O10)(OH)2
Kinoshitalite:
BaMg3(Si2Al2O10)(OH)2
Margarite:
CaAl2(Al2Si2O10)(OH)2
These are all phyllosilicates (chain silicates).
The brittle mica group is a member of the mica group.
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