Synthesis and X-Ray Powder Diffraction Analysis of a New Metallic (but not Superconducting) Copper Oxide: La_1.67Sr_0.33Cu₂O₅

Abstract

An ordered oxygen-deficient tetragonal perovskite compound La1.67Sr0.33Cu2O5 has been synthesized by solid state reaction. X-ray powder diffraction was used to characterize the material. Unit cell parameters least-squares refined from non-overlapping diffraction peaks are a = 10.8696(9)Å, c = 3.8612(6)Å and V = 456.2(1)Å3. X-ray powder data have been obtained for the experimentally observed peak positions corrected for systematic errors, the relative intensities, values of dexp and the Miller indices of both resolved and overlapping reflections. The experimental diffraction pattern was compared to computer simulated patterns calculated from the neutron crystal structure parameters and the non-oxygen-deficient LaCuO3 compound. The figure of merit is F30 = 33.8 (0.018, 48). © 1988, Cambridge University Press. All rights reserved.