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The crystal structure of YBa2Cu3O6, the x = 1 phase of the superconductor YBa2Cu3O7−x

Published online by Cambridge University Press:  31 January 2011

J. S. Swinnea  and
H. Steinfink
J. S. Swinnea
Affiliation:
Materials Science and Engineering Program, Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712
H. Steinfink
Affiliation:
Materials Science and Engineering Program, Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712
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Abstract

Black crystals, displaying a micaccous habit, result from heating the 90 K superconducting phase YBa2Cu3O7−x above 1050°C. The crystals are tetragonal, P4/mmm, a = 3.863 (2) Å, c = 11.830 (4) Å, Z = 1, ρcal = 6.115 g/cm3. The 184 independent single-crystal reflections were used to refine the structure by least squares to R = 0.0374, wR = 0.0347. The structure contains Cu+ in twofold coordination and corrugated layers of Cu2+–O. The Ba2+ is in eightfold coordination between the Cu+ and Cu2+ layers and Y is in eightfold coordination between the Cu2+ layers.

Type
Materials Communications
Information
Journal of Materials Research , Volume 2 , Issue 4 , August 1987 , pp. 424 - 426
Copyright
Copyright © Materials Research Society 1987

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References

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