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Mass spectrometric study of gaseous molybdenum, tungsten, and uranium oxides

par DeMaria, G.;Burns, R.P.;Drowart, Jean ;Inghram, Mark
Référence The Journal of Chemical Physics, 32, 5, page (1373-1377)
Publication Publié, 1960

Article révisé par les pairs

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Résumé :

Partial pressures of the gaseous oxides MoO, MoO2, MoO 3 WO, WO2, WO3, UO, UO2, and UO 3 in the systems Mo-Al2O3 and U-Al 2O3 have been measured by mass spectrometric methods. The vapor pressure of uranium has also been determined. The reaction enthalpies derived from these measurements are: Reaction ΔH0° kcal/mole MoO(g)→Mo(g)+O(g) 116±15 MoO2(g)→Mo(g) +2O(g) 262±10 MoO3(g)→Mo(g)+3O(g) 411±7 WO(g)→W(g)+O(g) 154±10 WO2(g)→W(g)+2O(g) 296±7 WO3(g)→W(g)+3O(g) 443±7 UO(g)→U(g)+O(g) 179±7 UO2(g)→U(g)+2O(g) 340±7 UO 3(g)→U(g)+3O(g) 493±7 U(s)→U(g) 126±5.