eguëite

eguëite

[e′gwā‚īt]
(mineralogy)
CaFe14(PO4)10(OH)14·21H2O A brownish-yellow mineral consisting of a hydrated basic phosphate of calcium and iron; occurs as small nodules.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.