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wolframite

American  
[wool-fruh-mahyt, vawl-] / ˈwʊl frəˌmaɪt, ˈvɔl- /

noun

  1. a mineral, iron manganese tungstate, (Fe,Mn)WO 4 , occurring in heavy grayish-black to brownish-black tabular or bladed crystals: an important ore of tungsten.

wolframite British  
/ ˈwʊlfrəˌmaɪt /

noun

  1. 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)WO 4

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of wolframite

First recorded in 1865–70; wolfram + -ite 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.