eastonite

eastonite

[′ē·stə‚nīt]
(mineralogy)
K2Mg5 AlSi5 Al3O20(OH4) A mineral consisting of basic silicate of potassium, magnesium, and aluminum; it is an end member of the biotite system.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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