X-ray diffraction patterns of LuNi₂B₂C and YNi₂B₂C

Reference X-ray diffraction patterns for the quarternary intermetallic superconductor phases of compositions LuNi₂B₂C and YNi₂B₂C are reported. Both materials were synthesized by the arc-melting technique. The patterns of these metallic phases exhibit preferred orientation in an ordinarily pressed sample, which was minimized through special specimen preparation. The observed intensities and the calculated values for both phases agree reasonably well with each other. Both compounds were refined in the space group I4/mmm, with a = 3.4647(1) Å and c = 10.6330(4) Å for LuNi₂B₂C and a = 3.5271(1) Å, c = 10.5361 (7) Å for YNi₂B₂C.