Enthalpies of the germanides Gd5Ge3 GdGe, and GdGe1.5 were measured in the
range 298.15-2155 K for the first time by the method of mixing calorimetry.
The temperatures, enthalpies, and entropies of melting of the compounds we
re determined, and also those of the polymorphic transformations in GeGd1.5
. Equations for the temperature dependence of the basic thermodynamic funct
ions over a wide temperature range were determined and recommended for prac
tical use.