For the first time the heat capacities of compound Bi12.5Er1.5CoO22.3 have been measured in the temperature range of 193-547 K. Differential scanning calorimetry has been used for measurements. The temperature dependence of heat capacity has been well described by a polynomial C-p,m(o) (T) = 665.46 + 0.82227 T - 3.9692.10(-4) T-2 - 5.3798.10(6)/T-2. On the basis of smoothed heat capacities the enthalpy and entropy increments have been calculated (T = 193-547 K). (C) 2018 Elsevier Ltd.