Enthalpy and heat capacity of Na2MoO4 and CaMoO4

Investigation of the Cs2(Mo,Te)O4 Solid Solution and Implications on the Joint Oxyde-Gaine System in Fast Neutron Reactors

“…The transition enthalpy was calculated against the α to β phase transition in Na 2 MoO 4 (from a cubic Fd 3̅ m to an orthorhombic structure [Note: Bottelberghs and van Buren suggested Pbn 2 1 as the most probable space group, but a complete structure determination is lacking. ]), whose transition enthalpy is equal to (22.61 ± 0.5 kJ mol –1 ) as reported by Sugawara et al In this case, the sample and reference materials should have comparable thermal properties, and no correction factor was applied. The derived transition enthalpy for Cs 2 Mo 0.5 Te 0.5 O 4 using the Na 2 MoO 4 reference was found equal to (2.79 ± 0.30) kJ mol –1 , in very good agreement within the uncertainty with the value derived with the Al reference, i.e., (2.94 ± 0.05) kJ mol –1 , which gives us good confidence in the accuracy of the data and reliability of the method.…”

Study of the volatilization of cesium and rhenium in the waste vitrification process

“…Lastly, the Mo found in the white phase suggests a possible mixing with Ca, Cs, Na, and Re in a liquid molybdic phase during glass synthesis (attracting cations from the calcine), and then a crystallization after cooling (CsReO4, NaReO4, Na2MoO4, CaMoO4). Volatilization could come from the formation of gaseous species (Mo, Cs, Re, O, Ru) because of the low melting temperature of this phase and the main compounds present (Na2MoO4 -680°C -, CsReO4 -620°C -, NaReO4 -420°C -, LiReO4 -419°C -, KReO4 -551°C -) [26][27]. Moreover, it has to be remembered that the vaporization temperature of eutectics is certainly low compared to that of pure components.…”

Simple and Controllable Preparation of Molybdenum Carbides by One-Step Co-Electrolysis of Na2MoO4 and CO2

“…Na 2 MoO 4 , is also an important compound for Mo metallurgy and material preparation. [20][21][22][23] It provides an opportunity to directly prepare molybdenum carbides by co-electrolysis of Na 2 MoO 4 and CO 2 in molten salts.…”