In the present work, the temperature dependence of heat capacity Cp,m∘=f(T) of crystalline bis-(η 6 -diphenyl)chromium (I) fulleride [(η 6 -Ph 2 ) 2 Cr] + [C 60 ] − has been measured by precision adiabatic vacuum calorimetry between T=(6 and 360)K with an uncertainty of ±0.2%. In this temperature interval, the transformations were detected and their thermodynamic characteristics were estimated. The experimental data were used for calculating standard (p o =0.1MPa) thermodynamic functions Cp,m∘/R, Δ0THm∘/RT, Δ0TSm∘/R and Φm∘/R=Δ0TSm∘/R-Δ0THm∘/RT (where R is the universal gas constant) in the range T→(0 to 360)K.