wolframite
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wolf·ram·ite
(wo͝ol′frə-mīt′)n.
Any of several red-brown to black minerals with the general formula (Fe,Mn)WO4, which constitute a major source of tungsten.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
wolframite
(ˈwʊlfrəˌmaɪt)n
(Minerals) a black to reddish-brown mineral consisting of tungstates of iron and manganese in monoclinic crystalline form: it occurs mainly in quartz veins and is the chief ore of tungsten. Formula: (Fe,Mn)WO4
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
wolf•ram•ite
(ˈwʊl frəˌmaɪt, ˈvɔl-)n.
a mineral, iron manganese tungstate, (Fe,Mn)WO4, occurring in heavy grayish black to brownish black tabular or bladed crystals: an important ore of tungsten.
[1865–70]
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| Noun | 1. | wolframite - a mineral consisting of iron and manganese tungstate in crystalline form; the principal ore of tungsten; found in quartz veins associated with granitic rocks atomic number 74, tungsten, W, wolfram - a heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition |
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