Table 1.

Summary of thermodynamic data for uranyl peroxide compounds in kJ/mol. ΔHds: enthalpy of drop solution; ΔHf,ox: enthalpy of formation from the oxides; ΔHf,el: enthalpy of formation from the elements

CompoundFormulaΔHdsΔHf,oxΔHf,el
Studtite (19)(UO2)O2(H2O)4+273.2 (± 3.6)+22.3 (± 3.9)−2,344.7 (± 4.0)
LiUTLi4[UO2(O2)3](H2O)10+794.4 (± 12.6)−260.9 (± 13.2)−5,540.2 (± 14.0)
NaUTNa4[UO2(O2)3](H2O)9+725.8 (± 7.7)−515.5 (± 8.9)−5,147.4 (± 9.9)
KUTK4[UO2(O2)3](H2O)9+460.5 (± 7.9)−453.4 (± 9.3)−4,975.8 (± 9.3)
U60Li40K20[UO2(O2)(OH)]60(H2O)214+350.0 (± 4.6)−138.1 (± 5.0)−2,784.3 (± 5.1)

Data refer to one mole of U.