[en] The X-ray diffraction analysis of the alloys in ZrPd₃-ZrRh₃ system has led to the detection of five close packed transition phases with eight, nine, twelve, seven and ten layers parallel to the hexagonal basal plane. Alloy Zr₂₅Pd₇₀Rh₅ quenched from 1200⁰C contained the phases : LI₂ phase with a=3.926A and an eight layer h.c.p. phase with a=5.609A, c=18.584A. Alloy ZrRhPd₂ quenched from 1000⁰C contained the phases : LI₂ phase with a=3.926A and a nine layer h.c.p. phase with a=5.586A, c=18.894A. Alloy ZrRhPd₂ quenched from 1200⁰C contained the phases LI₂ phase with a=3.926A and a twelve layer h.c.p. phase with a=5.583A, c=27.123A. Alloy ZrPdRh₂ quenched from 1000⁰C contained the phases: LI₂ phase (traces) and a seven layer h.c.p. phase with a=5.597A, c=14.697A. Alloy ZrPdRh₂ quenched from 1200⁰C contained the phases : LI₂ (Traces) and a ten layer h.c.p. phase with a=5.623A, c=21.379A. The stability of the phases has been discussed in terms of size factor and electronic factors. No similar phases were found in the homologous system ZrPd₃-ZrIr₃. (author)