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The vaporization and thermal stability of lithium molybdates

Authors
Journal
Journal of Nuclear Materials
0022-3115
Publisher
Elsevier
Publication Date
Volume
105
Issue
1
Identifiers
DOI: 10.1016/0022-3115(82)90456-1
Disciplines
  • Chemistry

Abstract

Abstract Two lithium molybdates, δ-Li 4MoO 5 and Li 2MoO 4, were evaporated and measured by high temperature mass spectometry. Various lithium and molybdenum oxide ions were observed, and their partial pressures were obtained. From the thermochemical calculation of evaporation, the heats of formation of the molybdates were obtained for the following reactions, Li 2O(c) + 1 2 MoO 3(c) = 1 2 δ-Li 4Mo0 5(c), ΔH r.298 o = − 120.4 kj.mol −1 , and Li 2O(c) + MoO 3(c) = Li 2MoO 4(c), ΔH r.298 o = − 154.7 kj.mol −1 . Thermochemically, Li 2MoO 4 is less stable than δ-Li 4MoO 5 .

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