Crystal structures of the RCuPbSe3 (R = Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) compounds

The crystal structures of the RCuPbSe3 (R = Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) compounds (beta-BaLaCuSe3 structure type, space group Pnma, Pearson symbol oP24) were determined by means of X-ray powder diffraction: a = 1.0687(2) nm, b = 0.40858(5) run, c = 1.3443(2) nm, R-1 = 0.0856 (GdCuPbSe3); a = 1.0603(1) nm, b = 0.40680(3) nm, c = 1.3414(1) nm, R-1 = 0.0870 (ThCuPbSe3); a = 1.05606(9) nm, b = 0.40594(3) nm, c = 1.34236(9) nm, R-1 = 0.0833 (DyCuPbSe3); a = 1.0528(1) nm, b = 0.40516(5) nm, c = 1.3420(2) nm, R-1 = 0.0912 (HoCuPbSe3); a = 1.04846(8) nm, b = 0.40424(3) nm, c = 1.34143(7) nm, R-1 = 0.0824 (ErCuPbSe3); a = 1.0447(1) nm, b = 0.40400(4) nm, c = 1.3423(1) nm, R-1 = 0.0937 (TmCuPbSe3); a = 1.03988(5) nm, b = 0.40285(2) nm, c = 1.34089(5) nm, R-1 = 0.0791 (YbCuPbSe3); a 1.03857(6) nm, b = 0.40248(2) nm, c = 1.34056(6) nm, R-1 = 0.0769 (LuCuPbSe3). (C) 2004 Elsevier B.V. All rights reserved.