Heat capacities and thermodynamic functions of Li.sub.2TeO.sub.3 and Li.sub.2TeO.sub.4

The Li.sub.2TeO.sub.3 (s) and Li.sub.2TeO.sub.4 (s) were synthesized using solid-state reaction route and characterized using X-ray powder diffraction techniques. Molar heat capacity measurement on Li.sub.2TeO.sub.3 (s) and Li.sub.2TeO.sub.4 (s) were carried out using differential scanning calorimeter. The molar heat capacity values were least squares analyzed, and the dependence of molar heat capacity with temperature for Li.sub.2TeO.sub.3 (s) and Li.sub.2TeO.sub.4 (s) can be given as,Cp,moTLi2TeO3,s,T/J K-1mol-1=107.56+0.05TK-2.21x106T-2K325[less than or equal to]TK[less than or equal to]675.Cp,moTLi2TeO4,s,T/J K-1mol-1=121.59+0.06TK-1.92x106T-2K325[less than or equal to]TK[less than or equal to]675.From these data, other thermodynamic functions such as enthalpy increment ( [Formula omitted]), entropy ( [Formula omitted]) and Gibbs energy functions {-( [Formula omitted]) T.sup.-1} were computed.