Abstract
The enthalpy increment measurements were performed using drop calorimetry on two lanthanide zirconates Ln 2Zr 2O 7, Ln = La, Nd, with pyrochlore structure. The temperature dependence of heat capacity in the range (298 to 1550) K was derived by simultaneous linear regression of the measured enthalpies combined with the heat capacity data around ambient temperature. The obtained heat capacity C p ∘ ( T ) is compared to the limit of constant volume lattice C v calculated from the analysis of low temperature specific heat data using a combined Debye–Einstein harmonic approximation model.
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