Search results
Results From The WOW.Com Content Network
Tungsten (also called wolfram) [14] [15] is a chemical element; it has symbol W and atomic number 74. It is a rare metal found naturally on Earth almost exclusively as compounds with other elements. It was identified as a distinct element in 1781 and first isolated as a metal in 1783.
Tungsten (W) 74 tung sten: Swedish and Danish "heavy stone" descriptive From the Swedish and Danish "tung sten", which means "heavy stone". · Symbol W is from the German name Wolfram. · Former name Wolfrahm (German, literally "wolf cream") was the historical name. The names wolfram or volfram are still used in Swedish and several other ...
Another catalytic use of tungsten is as a De-NO X catalyst which is used in the treatment of nitrogen oxide emissions to convert harmful nitrogen oxides into inert N 2 gas. [14] Another modern day use of tungsten is as a lubricant. Tungsten disulfide (WS 2) is a lubricant with a dynamic coefficient of friction of ~0.03. Tungsten disulfide can ...
The English name of element 74 is tungsten and not wolfram: the latter was once adopted by IUPAC (in 1949), but is no longer recommended by them (even as an alternative) per the 2011 Principles. (Of course, the symbol is still W, and the name "wolfram" may be referred to when explaining why that is the case, or when quoting text in languages ...
Tungsten, also known as wolfram, is a chemical element with the chemical symbol W and atomic number 74. The word tungsten comes from the Swedish language tung sten directly translatable to heavy stone , [ 17 ] though the name is volfram in Swedish to distinguish it from Scheelite , in Swedish alternatively named tungsten .
"Wolfram" is an alternate name for tungsten, a strategic material used in anti-tank weapons and machine tools. Most of the wolframite mines in Europe, such as the Barruecopardo mine, are in northwestern Spain and northern Portugal. [a] The high demand for this scarce strategic mineral in war time had created a bubble in prices, with the ...
Wolfram may refer to: Wolfram (name), a Germanic masculine given name and a surname (includes a list of people with the name) Wolfram (musician), an Austrian DJ; Wolfram (element), the original name for the chemical element best known as tungsten; Wolfram Research, a software company known for the symbolic computation program Mathematica
Scheelite is a calcium tungstate mineral with the chemical formula Ca W O 4.It is an important ore of tungsten (wolfram). Scheelite is originally named after Swedish chemist Carl Wilhelm Scheele (1742–1786).