Heat-capacity measurements made on zone-refined rods revealed no anomalies in the diamagnetic material. The heat capacity, Cp/R, entropy, [So(T)-So(0)]/R, and Gibbs energy, [Go(T)-Ho(0)]/RT, were 11.66±0.03, 9.999±0.03 and 4.376±0.03, respectively, at 298.15K.

Lanthanide Hexaborides. I. Heat Capacities and Some Thermophysical Properties of LaB6, NdB6, and GdB6 at Temperatures from 5K to 350K. Westrum, E.F., Andrews, J.T.S., Justice, B.H., Johnson, D.A.: Journal of Chemical Thermodynamics, 2002, 34[2], 239-50