Measurements of the heat capacity of lithium carbonate were carried out with a heat conduction calorimeter in the temperature range of 303.15–563.15K at atmospheric pressure. The temperature dependence of the heat capacity is C p ( J mo l − 1 K − 1 ) = 92.80 + 0.09 T − 1.91 × 10 6 T − 2 . The thermodynamic functions with reference temperature 298.15K, calculated in the same temperature range are: H T − H 298 ( kJ mo l − 1 ) = − 48.92 + 0.14 T + 6.68 × 10 5 T − 2 , S T − S 298 ( J mo l − 1 K − 1 ) = − 53.73 + 0.24 T − 1.55 × 10 6 T − 2 .