Blue oxide of molybdenum

Oxides of molybdenum corresponding to the formulae M02O3, MoOj, and M0O3 are known to exist that represented by the last formula, an add-forming oxide, has been studied in greatest detail. The intermediate blue oxide of molybdenum, obtained by the reduction of the trioxide, is well known, but its composition cannot be considered to be satisfactorily settled the formula MojOg is usually ascribed to it. 

Molybdenum Oxide (Blue), MOjOg ( ) or MOgO ( ).—If a suspension of molybdenum trioxide in water be heated on a water-bath with a large excess of pow dered molybdenum, a blue solution is obtained, containing, it is supposed, unpolymerised molecules of the compound MogOg but it is by no means certain either that this formula represents the actual composition of the substance, or that there is but one blue oxide of molybdenum. On addition of certain salts polymerisation is considered (Dumanski) to take place, and the oxide passes to the colloid form. 

The blue oxide of molybdenum, which can be regarded as a molybdate of molybdenum, is a dark blue substance, of density 3 6 at 18° C., which consists, when obtained by evaporation of a solution, of brilliant vitreous particles, giving tlie substance a crystalline appearance. ... 

Molybdenum Molybdate, molybdenum blue, the blue oxide of molybdenum, has already been described (see p. 131). 

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See also in sourсe #XX -- [ ]

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