Tungsten synthesis

6synthesis methods

Product Name:Tungsten
CAS Number:7440-33-7
Molecular formula:W
Molecular Weight:183.84

Tungsten occurs principally in the minerals wolframite (Fe,Mn)WO4, scheelite (CaWO4), ferberite (FeWO4), and hubnerite (MnWO4). These ores are found in China, Russia, Canada, Austria, Africa, Bolivia, Columbia, and Portugal. Wolframite is the most important oreworldwide; scheelite is the principal domestic U.S. ore. Scheelite, when pure, contains 80.6% WO3, the most common impurity being MoO3. The percentages of FeO and MnO in wolframite vary considerably; hubnerite is the term applied to ore containing more than 20% MnO and ferberite and to ore containing more than 20% FeO. Intermediate samples are called wolframite.

13283-01-7 Synthesis

13283-01-7
196 suppliers
$39.59/5g

7440-33-7
301 suppliers
$25.00/50g

Yield:7440-33-7 82.9%

Reaction Conditions:

with magnesium hydride in toluene;byproducts: H2; (argon); refluxing WCl6 and MgH2 in toluene in a mill under continuous grinding (8.5 h); washing (toluene), trituration with EtOH, filtration, boiling with concd. HCl, filtration, washing (H2O; EtOH), drying;

References:

Knott, Wilfried;Frommeyer, Georg;Klapdor, Astrid;Windbiel, Dagmar [Zeitschrift fur Naturforschung, B: Chemical Sciences,1998,vol. 53,# 4,p. 459 - 468]