随着Li和（Al+Ti）含量的增加，白色云母成份从a，b，c带的铁叶云母演化到d带的铁锂云母；
( 3 ) With increasing Li and ( Al + Ti ) , white mica evolves from siderophyllite in zone a , b and c to zinnwaldite in zone d ;
一种含铁和锂的云母。
A mica containing iron and lithium .
铁锂云母