Crystal structure and superconductivity of indium-rich In--Bi and In--Sb alloys after high-pressure treatment

After heat and pressure treatments and quenching of the alloys, x-ray phase analysis and measurements of T/sub c/ showed an expansion of the range of homogeneity of the compounds In2Bi and In5Bi3. The phase transition in the alloy In--33 at. % Bi at P = 20 kbar and T = 20 0C was a transformation of the In2Bi ω phase to the In5Bi3 z phase due to a shift to higher indium concentrations of the ranges of stability of these phases with increasing pressure. In In--Sb alloys (with 20--40 at. % Sb) two new intermediate phases were discovered after the action of pressure. These were the ω and z analogs of the compounds In2Bi and In5Bi3, confirming the homology rule for binary systems