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Nd4Cu2O7: A Copper(I) Oxide with a Novel Cooperatively Distorted T′ Type Structure

✍ Scribed by D.R. Pederzolli; J.P. Attfield

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
322 KB
Volume
136
Category
Article
ISSN
0022-4596

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✦ Synopsis

The crystal structure of Nd 4 Cu 2 O 7 (monoclinic, space group A2/m, a ‫؍‬ 8.4493(2) A s , b ‫؍‬ 3.7591(1) A s , c ‫؍‬ 12.6006(5) A s , ‫؍‬ 109.576(4)°, Z ‫؍‬ 2), prepared by topotactic reduction of the high-T c superconductor parent phase Nd 2 CuO 4 , has been determined by Rietveld fitting of time-of-flight neutron powder diffraction data (R wp ‫؍‬ 1.90%). A novel oxygen-vacancy-ordered arrangement of cooperatively distorted Cu 2 O 3 planes containing 2-and 4-coordinate Cu ؉ sites is found.

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