Heat capacity of oxide compounds formed in the Na$_2$O–TiO$_2$(WO$_3$), K$_2$O–B$_2$O$_3$(WO$_3$) and Cs$_2$O–TeO$_2$(UO$_3$) systems

The dependence of the standard heat capacity of oxide compounds M$_2$O $\cdot$ $n$TiO$_2$ (WO$_3$, B$_2$O$_3$, TeO$_2$, UO$_3$), where M = Na, K, Cs, on the concentration of the second component is shown to be linear. Relying on the obtained results, the available information on the heat capacities of complex compounds based on alkali metal oxides was clarified. The standard heat capacities of the analyzed oxide compounds were calculated using empirical equations.