Thermochemistry of oxide bronzes. Part II. Sodium tungsten bronzes NaxWO3(x= 0·53 and 0·77)
Abstract
The enthalpies of formation from Na(s) and WO3(s) of two cubic phase sodium tungsten bronzes. Na0·53WO3(s) and Na0·77WO3(s), have been determined by solution calorimetry. The thermodynamic stability of the cubic phase towards oxidation and disproportionation is discussed.