afwillite

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afwillite

[′af·wə‚līt]
(mineralogy)
Ca3Si2O4(OH)6 A colorless mineral consisting of a hydrous calcium silicate and occurring in monoclinic crystals; specific gravity is 2.6.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.