tavistockite

tavistockite

[′tav·ə‚stä‚kīt]
(mineralogy)
Ca3 Al2(PO4)2(OH)6 A white, orthorhombic mineral consisting of a basic phosphate of calcium and aluminum.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.