Preparation of sodium dimolybdate by the pyrolysis of sodium oxomolybdenum (VI) oxalate |
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Authors: | S.P. Goel P.N. Mehrotra |
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Affiliation: | Department of Chemistry, University of Roorkee, Roorkee 247 667 India |
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Abstract: | Thermal studies on various oxalato complexes have been of immense interest as they yield finely divided, highly reactive oxides which are usually obtained at a much lower temperature than that required in the conventional method of preparation, i.e., heating a mixture of two or more constituents [1]. A survey of the literature reveals that the compounds having the general formula A2[Mo2O5(C2O4)2(H2O)2], where A = K+, NH+4[2] and A = Cs+ [3], have been prepared and their thermal decomposition is studied, but no such information is available regarding the preparation and characterisation of Na2[Mo2O5(C2O4)2(H2O)2] (SMO), which forms the subject of study of this paper. Sodium dimolybdate (Na2Mo2O7), the decomposition product of SMO, is obtained at 280°C, a temperature much lower than that required in the conventional method of preparation of heating a mixture of Na2MoO4 and MoO3 [4]. |
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