Wolframitenoun
(mineral) A mineral that consists of a tungstate of iron and manganese; (Fe,Mn)WO4.
Tungstennoun
A rare metallic chemical element (symbol W, from Latin wolframium) with an atomic number of 74.
Wolframitenoun
Tungstate of iron and manganese, generally of a brownish or grayish black color, submetallic luster, and high specific gravity. It occurs in cleavable masses, and also crystallized. Called also wolfram.
Tungstennoun
A light bulb containing tungsten.
Wolframitenoun
a mineral consisting of iron-manganese tungstate in crystalline form; the principal ore of tungsten; found in quartz veins associated with granitic rocks
Tungstennoun
scheelite, calcium tungstate
Wolframite
Wolframite is an iron, manganese, and tungstate mineral with a chemical formula of (Fe,Mn)WO4 that is the intermediate between ferberite (Fe2+ rich) and hübnerite (Mn2+ rich). Along with scheelite, the wolframite series are the most important tungsten ore minerals.
Tungstennoun
A rare element of the chromium group found in certain minerals, as wolfram and scheelite, and isolated as a heavy steel-gray metal which is very hard and infusible. It has both acid and basic properties. When alloyed in small quantities with steel, it greatly increases its hardness. Symbol W (Wolframium). Atomic weight, 183.6. Specific gravity, 18.
Tungstennoun
Scheelite, or calcium tungstate.
Tungstennoun
a heavy gray-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite
Tungsten
Tungsten, or wolfram, is a chemical element with the symbol W and atomic number 74. Tungsten is a rare metal found naturally on Earth almost exclusively as compounds with other elements.