Tungsten pentoxide () was reported in early literature but proved to have the stoichiometry W₁₈O₄₉.Wells A.F. (1984) ''Structural Inorganic Chemistry'' 5th edition Oxford Science Publications Sometimes called mineral blue, it is a blue solid formed by the reaction of tungsten trioxide, WO₃, and

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. It was identified as a new element in 1781 and first isol ...

metal at 700 °C.

Intermediate oxides of tungsten

There are a number of these unusual intermediate oxides formed from reacting metal and trioxide namely, W₂₀O₅₈, W₂₄O₇₀. W₁₈O₄₉ contains both

octahedral In geometry, an octahedron (plural: octahedra, octahedrons) is a polyhedron with eight faces. The term is most commonly used to refer to the regular octahedron, a Platonic solid composed of eight equilateral triangles, four of which meet a ...

and pentagonal bipyramidal co-ordination of the metal

atom Every atom is composed of a nucleus and one or more electrons bound to the nucleus. The nucleus is made of one or more protons and a number of neutrons. Only the most common variety of hydrogen has no neutrons. Every solid, liquid, gas, ...

s by

oxygen Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as ...

References

Tungsten compounds Transition metal oxides {{inorganic-compound-stub

Intermediate oxides of tungsten

See also

References