pyrosmalite


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pyrosmalite

[pī′räz·mə‚līt]
(mineralogy)
(Mn,Fe)4Si3O7(OH,Cl)6 A colorless, pale-brown, gray, or gray-green mineral composed mainly of basic iron manganese silicate with chlorine.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.