Figure 7
Thermodynamic coefficients of Cs2MGaBr6 perovskites as a function of temperature (a) fluctuations in vibrational internal energy (E in \({\text{kJ}}/{\text{mol}}\)), (b) the vibrational Helmholtz free energy (A in \({\text{kJ}}/{\text{mol}}\)), (c) the vibrational entropy (SV in \({\text{J}}/{\text{K}}/{\text{mol}}\)), and (d) the constant-volume heat capacity (CV in \({\text{J}}/{\text{K}}/{\text{mol}}\)).
