Huch M. Phase equilibria and crystal structures of the compounds in the R2X3 - Cu2X - In2X3 (R - Y, La, Pr, Er; X - S, Se) systems and related systems

Isothermal sections of the systems R2X3 - Cu2X - In2X3 (R - Y, La, Pr, Er; X - S, Se) have been constructed at 870 K in whole concentration ranges. The existences of 31 compounds, among these 8 ternary and 19 quaternary, was established.. The crystal structures of all compounds have been determined by means of X-ray single crystal and powder diffraction. For most of the ternary and quaternary compounds homogeneity regions are typical. The compounds crystallize in 10 structure types; 5 of them (La4In4,67Se13, La2CuInS5, La2CuInSе5, Yb5,5AgSe8 та YbAgSe2) crystallize in own structure type. The comparison of the investigated and related systems was discussed. The relations between the presently investigated structure types and those known from literature structures was discussed.