The temperature dependence of the order parameters and the axial initial sp
litting parameter of Gd3+ impurity complexes is measured in the first low-s
ymmetry phase of CsSrCl3, and the relationship between these parameters is
found. The parameters of the thermodynamic potential, which takes into acco
unt the interaction of the order parameter with strains, are estimated. The
nature of the temperature dependence of the axial initial splitting parame
ter in the cubic phase is explained. (C) 1999 American Institute of Physics
. [S1063-7834(99)03211-6].