The critical analysis of literature heat capacity data in the temperature range 0-1600K was carried out. It was shown that joining of C-p(T) Curves obtained by the different methods was performed improperly. Experimental heat capacity of LaPO4 was measured in the region 16-324K by the adiabatic calorimetry. The obtained data allows to consist the results of different works and to fit the lanthanum orthophosphate heat capacity in the wide temperature range. Standard thermodynamic properties were calculated on the basis of the refined heat capacity data: C-p(0)(298.15 K)=102.5 +/- 0.2JK(-1) mol(-1), S-0(298.15 K)=108.7 +/- 0.2JK(-1) mol(-1), H-0(298.15 K)-H-0(0K)=17.44 +/- 0.03kJ mol(-1), phi(0)(298.15 K)=50.21 +/- 0.20JK(-1) mol(-1). (c) 2008 Elsevier B.V. All rights reserved.