Calculating the temperature dependence of the specific heat for rare-earth arsenates

Hydration and proton conductivity in LaAsO4

“…10 LaAsO 4 has the highest thermal stability within the LnAsO 4 series of compounds, 8 but the orthoarsenates are in general less stable than their ortho-phosphate counterparts with respect to evaporation of gaseous oxides. 11 Although the literature on the structural, vibrational, dielectric and thermodynamic properties of rare-earth arsenates is significant, [8][9][10][11][12][13][14][15][16] reports of their electrical and defect chemical properties are scarce. 12 Pradhan and Choudhary 12 investigated the electrical conductivity of nominally undoped, polycrystalline LaAsO 4 below 200 C, which they, based on a high activation energy, attributed to transport of unspecified ionic species.…”