The heat capacity for tris-hexafluoroacetylacetonate of aluminium (Al(C5HF6O2)(3) or tris(1,1,1,5,5,5-hexa fluoro-2,4-pentanedionate) aluminium (III)) within a temperature range (9.83-299.76) K has been measured by the adiabatic method. The functional behaviour of sample's heat capacity was analysed. No phase transition-related anomalies in the heat capacity behaviour were found. Crystal lattice anisotropy of a studied complex was evaluated. The Debye temperature at 0 K was calculated. The obtained data were used to calculate smoothed values of heat capacity, entropy, enthalpy, and reduced Gibbs energy in a temperature range of 0 K to 300 K. They have the following values at 298.15 K: C-p,C-m degrees = (608.3 +/- 1.0) J K-1 mol(-1), Delta S-298.15(0)m degrees = (786.5 +/- 2.1) J K-1 mol(-1), Delta H-298.15(0)degrees(m) = (106.91 +/- 0.20) kJ mol(-1), phi degrees(m) = (428.0 +/- 1.4) J K-1 mol(-1). The value of the absolute entropy were used to calculate the entropy of formation of Al(C5HF6O2)(3) (cr) at T = 298.15 K. (C) 2019 Elsevier Ltd.