View source for Tungsten pentoxide

{{Short description|Blue solid oxide of tungsten formed by reaction of tungsten trioxide and tungsten metal}}
{{Accuracy|date=February 2012}}

'''Tungsten pentoxide''' ({{chem2|W2O5}}) was reported in early literature but proved to have the [[stoichiometry]] W<sub>18</sub>O<sub>49</sub>.<ref name = "Wells">Wells A.F. (1984) ''Structural Inorganic Chemistry'' 5th edition Oxford Science Publications {{ISBN|0-19-855370-6}}</ref> Sometimes called mineral blue, it is a blue solid formed by the reaction of tungsten trioxide, WO<sub>3</sub>, and [[tungsten]] metal at 700 °C.<ref name = "Wells"/>

==Intermediate oxides of tungsten==
There are a number of these unusual intermediate oxides formed from reacting metal and trioxide, including W<sub>20</sub>O<sub>58</sub> and W<sub>24</sub>O<sub>70</sub>.<ref name = "Wells"/> W<sub>18</sub>O<sub>49</sub> contains both [[Octahedral molecular geometry|octahedral]] and [[Pentagonal bipyramidal molecular geometry|pentagonal bipyramidal]] co-ordination of the metal [[atom]]s by [[oxygen]].<ref name = "Wells"/>

==See also==
*[[Tungsten(III) oxide]]
*[[Tungsten(IV) oxide]]
*[[Tungsten(VI) oxide]]

==References==
{{reflist}}

{{Tungsten compounds}}
[[Category:Tungsten(V) compounds]]
[[Category:Transition metal oxides]]

{{inorganic-compound-stub}}