hisingerite
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hisingerite
[′hi·siŋ·ə‚rīt] (mineralogy)
Fe23-Si2O5(OH)4·2H2O A black, amorphous mineral composed of hydrous ferric silicate; an iron ore.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.