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Tungsten (also called wolfram) [ 11][ 12] is a chemical element; it has symbol W and atomic number 74. Tungsten is a rare metal found naturally on Earth almost exclusively as compounds with other elements. It was identified as a new element in 1781 and first isolated as a metal in 1783.
Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes through sintering for use in industrial machinery, cutting tools, chisels, abrasives, armor-piercing shells and jewelry.
Iridium is a chemical element; it has symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, it is considered the second-densest naturally occurring metal (after osmium) with a density of 22.56 g/cm 3 (0.815 lb/cu in) [8] as defined by experimental X-ray crystallography. [a] 191 Ir and 193 Ir ...
See how the WEST nuclear fusion reactor's tungsten upgrade led to a groundbreaking success, containing plasma at 50 million degrees Celsius.
Tungsten is one of the oldest elements used for alloying steel. It forms a very hard carbide and iron tungstite. High tungsten content in the alloy, however, tends to cause brittleness and makes it subject to fracturing rather than bending. [1] The SAE designation for all tungsten steels consist of four numbers beginning with the number 7, in ...
Tungsten (IV) oxide is the chemical compound with the formula W O 2. The bronze-colored solid crystallizes in a monoclinic cell. [1] The rutile -like structure features distorted octahedral WO 6 centers with alternate short W–W bonds (248 pm). [1] Each tungsten center has the d 2 configuration, which gives the material a high electrical ...
Wolframite is an iron, manganese, and tungstate mineral with a chemical formula of (Fe,Mn)WO4 that is the intermediate mineral between ferberite ( Fe2+ rich) and hübnerite ( Mn2+ rich). [4] Along with scheelite, the wolframite series are the most important tungsten ore minerals. Wolframite is found in quartz veins and pegmatites associated ...
Tungsten trioxide is a starting material for the synthesis of tungstates. Barium tungstate BaWO 4 is used as a x-ray screen phosphors. Alkali metal tungstates, such as lithium tungstate Li 2 WO 4 and cesium tungstate Cs 2 WO 4, give dense solutions that can be used to separate minerals. Other applications, actual or potential, include ...