Bulletin of the Chemical Society of Japan · 1964 · 23 citations · 1 references
Natural SciencesChemistryMaterials ScienceInorganic ChemistryOrganic ChemistryThermal AnalysisCrystal ChemistryThermogravimetric AnalysisX-ray CrystallographyDecomposition MechanismsQuaternary Ammonium CompoundsThermal DecompositionThermal Decomposition ReactionsThermal Degradation ProductsThermal Degradation StudiesThermochemistry Of OxidesX-ray Diffraction Analysis
Abstract The thermal decomposition of ammonium di-, hepta-, tri- and octamolybdates has been investigated by means of differential thermal analysis, chemical analysis, and X-ray diffraction techniques. The steps of the decomposition may be described as follows: Heptamolybdate 3(NH4)2O·7MoO3·4H2O\underset130°C→2(NH4)2O· 5MoO3\underset245°C→2(NH4)2O·8MoO3\underset360°C→MoO3 Dimolybdate (NH4)2O·2MoO3\underset226°C→(NH4)2O·3MoO3 \underset225°C→2(NH4)2O·8MoO3\underset360°C→MoO3 Octamolybdate 2(NH4)2O·8MoO3·2H2O\underset287°C→2(NH4)2O 8MoO3\underset370°C→MoO3 Trimolybdate (NH4)2O·3MoO3·xH2O\underset200°C→2(NH4)2O. 8MoO3\underset287°C→MoO3
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