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Characterisation of incommensurate Bi2+xSr2-xCuOzby X-Ray Powder Diffraction and Oxygen Content Determinations

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Author(s)

D. C. Sinclair, J. T.S. Irvine, A. R. West

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Abstract

The composition-temperature stability region of the solid solution Bi2+xSr2-xCuOz, phase R, has been determined. At 800°C, and at melting temperatures, with a supercell vector q*given by q*=n δb*-nεc*, where δ=0.21, ε=0.55, for x=0.30 and n=1, 2 …. Both a and ε increased with x, c decreased with x and δ was independent of x. The excess oxygen content, α, was determined to be (0.18±0.02) by citrate iodometry and was independent of x. The total oxygen content z, given by z=6+x/2+α, was confirmed to be 6.33±0.04, for x=0.30, by hydrogen reduction thermogravimetry.

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Details

Original languageEnglish
Pages (from-to)L2002-L2005
JournalJapanese Journal of Applied Physics
Volume29
Issue number11
DOIs
Publication statusPublished - Nov 1990

    Research areas

  • Bismuth strontium cuprate, Cuprate superconductor, Incommensurate structure

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