Crystal structure of the R2PbS4 (R = Yb and Lu) compounds

The crystal structure of the R2PbS4 (R = Yb and Lu) compounds (space group Pnma, Pearson symbol oP28, a = 1.1899(2) nm, b = 0.39015(8) nm, c = 1.4127(2) nm, R1 = 0.0349 for Yb2PbS4 and a = 1.1919(2) nm, b = 0.38890(8) nm, c = 1.4103(3) nm, R1 = 0.0343 for Lu2PbS4) was investigated by means of X-ray single crystal diffraction. The R atoms are surrounded by octahedra, the Pb atoms by trigonal prisms with one additional atom.