marmatite


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marmatite

[′mär·mə‚tīt]
(mineralogy)
A dark-brown to black mineral composed of iron-bearing sphalerite. Also known as christophite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The primary zinc mineral is marmatite, with pyrite and pyrrhotite also in abundance.