| Abstract: | Structure, Twinning, and Properties of Ce4Br3C4 The new compound Ce4Br3C4 can be prepared from Ce metal, CeBr3 and C (3 : 3 : 2) at 1020 °C. It crystallizes in P 1 with a = 422.7(1) pm, b = 1103.4(3) pm, c = 1126.8(2) pm, α = 77.15(3)°, β = 90.13(2)° and γ = 84.42(3)°. The crystals are characteristically twinned, the twin law being (1 0 0, 1/2 –1 0, 0 0 –1). The crystal structure contains puckered layers of edge sharing Ce6C2 octahedra. The mean C–C distance in the C2 units is 133(5) pm. Ce4Br3C4 has at room temperature a specific resistivity of 100 mΩ cm and an effective magnetic moment of 2.55(3) μB (Ce3+). |
