glaucodot


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glaucodot

[′glȯ·kə‚dät]
(mineralogy)
(Co,Fe)AsS A grayish-white, metallic-looking mineral composed of cobalt iron sulfarsenide, occurring in orthorhombic crystals.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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In addit ion there were Scandinavian classics like loose, sharp 2-cm pyritohedrons of cobaltite and sharp, lustrous pseudo-octahedrons of glaucodot from Sweden; well crystallized leucophanite, columbite and thortveitite from Norway; and richly brownish red, euhedral crystals of eudialyte to 2 cm in complex ultra-alkaline matrix, not from the Kola Peninsula, Russia, but from 19th-century localities in Greenland.
Glaucodot was identified by Excalibur Mineral Company (on behalf of Dan Behnke) during routine analytical work.
Rarely glaucodot (?), and breithauptite occur as inclusions in some of the pentlandite grains.