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[2] [3] It is the only known gaseous transition metal (or d-block) compound and the densest known gas under standard ambient temperature and pressure (298 K, 1 atm). [4] WF 6 is commonly used by the semiconductor industry to form tungsten films, through the process of chemical vapor deposition.
Tungsten(VI) oxytetrafluoride can be synthesized by the reaction of fluorine and tungsten trioxide. [4] It can also be obtained by treating tungsten with a mixture of oxygen and fluorine at high temperatures. [1] Partial hydrolysis of tungsten hexafluoride will also produce WOF 4. [9] WF 6 + H 2 O → WOF 4 + 2 HF
Tungsten hexafluoride (tungsten(VI) fluoride) This page was last edited on 18 July 2023, at ...
Tungsten tetrafluoride is an inorganic compound with the formula WF 4. This little studied solid has been invoked, together with tungsten pentafluoride , as an intermediate in the chemical vapor deposition of tungsten films using tungsten hexafluoride .
O 2 F 2 precipitates as a brown solid upon the UV irradiation of a mixture of liquid O 2 and F 2 at −196 °C. [8] It also only appears to be stable below −160 °C. [9] The general method of preparation of many oxygen fluorides is a gas-phase electric discharge in cold containers including O 2 F 2. [10] O 2 + F 2 → O 2 F 2 (electric ...
Many elements form anionic hexafluorides. Members of commercial interest are hexafluorophosphate (PF 6 −) and hexafluorosilicate (SiF 6 2−). Many transition metals form hexafluoride anions. Often the monoanions are generated by reduction of the neutral hexafluorides. For example, PtF 6 − arises by reduction of PtF 6 by O 2.
[40] [41] Tungsten typically combines with oxygen to form the yellow tungstic oxide, WO 3, which dissolves in aqueous alkaline solutions to form tungstate ions, WO 2− 4. Tungsten carbides (W 2 C and WC) are produced by heating powdered tungsten with carbon. W 2 C is resistant to chemical attack, although it reacts strongly with chlorine to ...
The simplest tungstate ion is WO 2− 4, "orthotungstate". [1] Many other tungstates belong to a large group of polyatomic ions that are termed polyoxometalates, ("POMs"), and specifically termed isopolyoxometalates as they contain, along with oxygen and maybe hydrogen, only one other element. Almost all useful tungsten ores are tungstates. [2]