Characterization and thermo physical property investigations on Ba1−xSrxMoO4 (x = 0, 0.18, 0.38, 0.60, 0.81, 1) solid-solutions

Ba1−xSrxMoO4 (x = 0, 0.18, 0.38, 0.60, 0.81, 1) solid-solutions were synthesized by complex polymerization method. The solid solutions were characterized using X-ray diffraction (XRD) and the Raman spectroscopy. Heat capacity measurements on Ba1−xSrxMoO4(s) were performed with heat flux-type differential scanning calorimeter in the temperature range of 140-870 K. The measured heat capacity values were used to calculate different thermodynamic functions such as enthalpy increment, entropy and Gibbs energy functions. Thermal expansion behavior of Ba1−xSrxMoO4(s) (x = 0, 0.6 and 1) were investigated in the temperature range 298-1273 K by high temperature X-ray diffraction (HTXRD). The specific heat and average volume thermal expansion coefficient of Ba1−xSrxMoO4(s) was found to increase with increase in concentration of strontium. The average volume thermal expansion coefficient of Ba1−xSrxMoO4(s) (x = 0, 0.6 and 1) was found to be 25.59 × 10−6, 33.86 × 10−6 and 34.37 × 10−6 K−1 respectively.