Crystal structure of ternary CeRhX compounds, X = As, Sb, Bi

Three intermetallic compounds CeRhAs, CeRhSb and CeRhBi were structurally s tudied by X-ray powder diffraction. From Rietveld refinement, all of them w ere found to crystallize in the TiNiSi structure type, space group Pnma (N6 2), a=0.75351(9) nm, b=0.43081(6) nm, c=0.73653(9) nm for CeRhAs, a=0.74150 (3) nm, b=0.46185(3) nm, c=0.78570(3) nm for CeRhSb and a=0.74648(5) nm, b= 0.47173(4) nm, c=0.79715(6) nm for CeRhBi. Refined atomic positional and th ermal parameters are presented. (C) 2000 Elsevier Science B.V. All rights r eserved.