A structural study of the quasi one-dimensional compound (Ca1-xYx)0.82CuO2 prepared at room pressure

Yuzuru Miyazaki, Ian Gameson, Peter P. Edwards

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11 Citations (Scopus)

Abstract

A solid solution of the quasi one-dimensional cuprate, (Ca1-xYx)0.82CuO2 (0 ≤ × ≤ 0.435), has been successfully synthesized in an oxygen stream at room pressure. Structural changes have been determined for the basic crystal structure by means of the Rietveld method using powder X-ray diffraction. Upon Y doping, the nearest (intrachain) Cu-Cu distance increases from 1.93 to 1.98 Å, while the next-nearest (interchain) Cu-Cu distance decreases from 3.46 to 3.41 Å. The incommensurate superstructure, originating from differences in the periodic arrangement of the (Ca, Y) atoms and CuO2 chains, has also been examined. The modulation period along the crystal a axis implies that the stoichiometry of the solid solution shifts toward that of the cation-deficient member (Ca1-xYx)0.80CuO2. This compositional discrepancy might be canceled by the large change in the modulation period along the c axis.

Original languageEnglish
Pages (from-to)511-516
Number of pages6
JournalJournal of Solid State Chemistry
Volume145
Issue number2
DOIs
Publication statusPublished - 1999 Jul

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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