strigovite

strigovite

[′strig·ə‚vīt]
(mineralogy)
Fe3(Al,Fe)3Si3O11(OH)7 A dark-green mineral of the chlorite group, composed of basic aluminum iron silicate; occurs as crystalline incrustations.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.