a salt of chlorous acid containing the monovalent, negative radical ClO
noun
any of a group of usually greenish, soft, monoclinic minerals, (Mg,Al,Fe)(Si,Al)O(OH), that break into thin, flexible, micalike sheets and are usually found in metamorphic rocks
A generally green or black secondary mineral, (Mg,Fe,Al)6(Si,Al)4O10(OH)8, often formed by metamorphic alteration of primary dark rock minerals, that appears as a spot of green and resembles mica.