spencerite

spencerite

[′spen·sə‚rīt]
(mineralogy)
Zn4(PO4)2(OH)2·3H2O A pearly white monoclinic mineral composed of hydrous basic zinc phosphate and occurring in scaly masses and small crystals.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.