PECULIARITIES OF THE B8-SOLID SOLUTION FORMATION IN NI(SB,SN) AND CO(SB,SN) SYSTEMS STUDIED BY MOSSBAUER-EFFECT METHOD

Quadrupole splitting and effective characteristic temperatures of Sn-1 19 in Ni(Sb,Sn) and Co(Sb,Sn) solid solutions with B8-type structure h ave been studied by Mossbauer Effect method. The electric field gradie nt at metalloid atoms was estimated in point charge model for differen t variants of local environment.On the basis of the comparison between experimental Quadrupole Splitting values and estimated Electric Field Gradient ones it was concluded that MeII-Sn pairs occur more often th an MeII-Sb when the amount of transition metal in ditrigonal-dibipyram idal positions is less than 0.10.