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Indexed Powder Data for Incommensurate Bi2Sr2Ca2Cu3Oz

Published online by Cambridge University Press:  10 January 2013

C. Namgung ,
E.E. Lachowski ,
J.T.S. Irvine  and
A.R. West
C. Namgung
Affiliation:
University of Aberdeen, Department of Chemistry, Meston Walk, Aberdeen AB9 2UE, U.K
E.E. Lachowski
Affiliation:
University of Aberdeen, Department of Chemistry, Meston Walk, Aberdeen AB9 2UE, U.K
J.T.S. Irvine
Affiliation:
University of Aberdeen, Department of Chemistry, Meston Walk, Aberdeen AB9 2UE, U.K
A.R. West
Affiliation:
University of Aberdeen, Department of Chemistry, Meston Walk, Aberdeen AB9 2UE, U.K
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Abstract

The X-ray powder pattern of the Pb-free 110 K superconductor phase Bi2Sr2Ca2Cu3Oz has many lines which belong to an incommensurate supercell. Using electron diffraction photographs as a guide, an indexing scheme for the powder pattern has been obtained. The unit cell has a geometrically orthorhombic subcell a = 5.411 (2), b = 5.420(2), c = 37.29(2) Å. Supercell reflections have indices that are derived from the subcell k, l indices by addition of ± q, where q = nδb + nεc: n = 1,2 …; ε = 0.211(2); ε = −0.78(1).

Type
Research Article
Information
Powder Diffraction , Volume 7 , Issue 1 , March 1992 , pp. 49 - 51
Copyright
Copyright © Cambridge University Press 1992

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References

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