Thermodynamic properties of Dion-Jacobson type layered perovskite phase KCa2NaNb4O13 were studied. Thermal expansion behaviour and phase transition of the compound were established using high-temperature X-ray diffraction (HTXRD). Temperature dependence of heat capacity of KCa2NaNb4O13 was measured by precision adiabatic vacuum calorimetry. Thermodynamic functions of the phase, namely, the heat capacity, enthalpy H degrees(T)-H degrees(0), entropy S degrees(T)-S degrees(0) and Gibbs function G degrees(T)-H degrees(0) have been determined for the range from T -> 0 K to 345 K based on the experimental data. (C) 2019 Elsevier Ltd.