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Date: 2012-04-04 12:13:03Refractory metals Transition metals Tungsten compounds Carbides Tungsten Molybdenum Ammonium paratungstate Titanium carbide Tungstate Chemistry Matter Chemical elements | TUNGSTEN A. Commodity Summary More than 20 tungsten-bearing minerals are known, but the principle domestic ores used to produce ammoniumAdd to Reading ListSource URL: www.epa.govDownload Document from Source WebsiteFile Size: 140,12 KBShare Document on Facebook |