Thermochemistry of Li1+xMn2−xO4 (0⩽x⩽1/3) spinel

The enthalpy of formation from oxides becomes more exothermic with x in Li1+xMn2−xO4 for stoichiometric compounds (x<0.25) and deviates endothermically from this trend for oxygen-deficient compounds (x⩾0.25).