Phyllosilicate mineral in the mica family
Anandite is a rare phyllosilicate with formula (Ba,K)(Fe2+ ,Mg)3 (Si,Al,Fe)4 O10 (S,OH)2 . It crystallizes in the monoclinic crystal system . It is black in color with a glassy luster and a near perfect cleavage.[ 3]
It was first described in 1967[ 3] for an occurrence in the Wilagedera Prospect of the North Western Province of Sri Lanka in bands of iron ore.[ 2] [ 4] It has also been found in Big Creek in Fresno County and in Trumball Peak in Mariposa County, California as well as the Sterling Mine in New Jersey .[ 2] It was named for Ananda Kentish Coomaraswamy (1877–1947), who was the director of the Mineral Survey of Ceylon, Sri Lanka at that time.[ 4]
Anandite is a member of the mica group of minerals.[ 3] Other minerals that anandite is associated with include: magnetite , chalcopyrite , pyrite , pyrrhotite and baryte .[ 3]
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