Occurs at the inner contact with lithium pegmatite around oligoclase andesite. Discredited as a mixture of two distinct amphibole compositions, tremolite and a new amphibole end-mem ber, Fluoro-sodic-pedrizite,
Discredited IMA 2005
Tastyg spodumene deposit, Tuva, Siberia, Russia, Link to MinDat.org Location Data.
Named for its monoclinic crystal structure and relationship with holmsquisite. Approved IMA 1985, Discredited IMA 2005 as being fluoro-sodic-pedrizite.