Thermodynamic properties of caesium–manganese phosphate CsMnPO4

• The heat capacity of crystalline CsMnPO4 was performed between T = (5 and 650) K.
• Phase transitions were found at T = (6.9 and 127) K.
• Thermodynamic functions were calculated over the range of T = (0 to 650) K.

The heat capacity measurements of the crystalline phosphate CsMnPO4 with a β-tridymite structure were performed between T = (5 and 650) K. Phase transitions were found at temperatures (6.9 and 127) K. They correspond to the order–disorder transition and the transition between monoclinic and orthorhombic modifications of CsMnPO4, respectively. Thermodynamic functions Cp,mo/R,Δ0THmo/RT,Δ0TSmo/R and Φmo/R were calculated over the range of T = (0 to 650) K from experimental values. The temperature dependence of the magnetic susceptibility of CsMnPO4 crystalline phosphate was studied over the temperature range from (2 to 300) K.

The temperature dependence of the heat capacity of crystalline CsMnPO4.Figure optionsDownload as PowerPoint slide