sheridanite
sheridanite
[′shər·ə·də‚nīt] (mineralogy)
(Mg,Al)6(Al,Si)4O10(OH)8 Pale-green to colorless talclike mineral composed of basic magnesium aluminum silicate.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.