Heat-treatment studies of molybdenum oxide-monohydrate

The dehydration of molybdic acid, MoO 3H 2O, was studied by thermal analysis, X-ray diffractometry and FTIR spectroscopy. The results show that an intermediate phase, MoO 3-2/3H 2O is formed at 216 °C and the monoclinic form of MoO 3 is grown above 350 °C. The mechanism of dehydration and structura...

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Bibliographic Details
Published in:Solid state ionics 1995-09, Vol.80 (3), p.271-275
Main Authors: Nazri, G.A., Julien, C.
Format: Article
Language:English
Subjects:
Chemistry
Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...)
Exact sciences and technology
Infrared spectroscopy
Inorganic chemistry and origins of life
Molybdenum oxide hydrates
Molybdenum trioxide
Preparations and properties
Thermal analysis
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Summary:The dehydration of molybdic acid, MoO 3H 2O, was studied by thermal analysis, X-ray diffractometry and FTIR spectroscopy. The results show that an intermediate phase, MoO 3-2/3H 2O is formed at 216 °C and the monoclinic form of MoO 3 is grown above 350 °C. The mechanism of dehydration and structural rearrangement were confirmed by the features of the infrared spectra showing formation of corner-shared MoO 6 octahedra.
ISSN:0167-2738
1872-7689
DOI:10.1016/0167-2738(95)00141-R