Crystal structures of the R2CuInS5 (R=La, Ce, Pr, Nd and Sm) compounds

The crystal structures of the R2CuInS5 (R = La, Ce, Pr, Nd, Sm) compounds (space group Pnma, Pearson symbol oP36) were determined by means of X-ray single crystal diffraction (a = 1.1487(2) nm, b = 0.39760(8) nm, c = 1.6911(3) nm, R1 = 0.0250 for La2CuInS5) and X-ray powder diffraction (a = 1.14396(7) nm, b = 0.39361(2) nm, c = 1.6804(1) nm, RBragg = 0.0937 for Ce2CuInS5; a = 1.14123(6) nm, b = 0.39119(2) nm, c = 1.6737(1) nm, RBragg = 0.0974 for Pr2CuInS5; a = 1.13948(6) nm, b = 0.38933(2) nm, c = 1.66886(9) nm, RBragg = 0.0853 for Nd2CuInS5; a = 1.13671(7) nm, b = 0.38594(2) nm, c = 1.6603(1) nm, RBragg = 0.0887 for Sm2CuInS5). The R-centered trigonal prisms, Cu-centered tetrahedra and In-centered octahedra can be selected in the crystal structures of the R2CuInS5 compounds.