Structural refinements of Yb2BaCuO5 and Lu2BaCuO5 by powder neutron diffraction

P. Lightfoot*, Shiyou Pei, J. D. Jorgensen, Y. C. Chang, P. Z. Jiang, B. W. Veal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The structure of the "211" or "green phases," Yb2BaCuO5 and Lu2BaCuO5, have been refined from time-of-flight powder neutron diffraction data. Both crystallize in the orthorhombic system, space group Pnma, with lattice parameters a = 12.0588(1), Å, b = 5.6123(1), Å, c = 7.0535(1), Å, and a = 12.0314(1), Å, b = 5.5989(1), Å, c = 7.0380(1), Å, respectively. The phases are isostructural with Y2BaCuO5, consisting of a three-dimensional framework of MO7 units (M = Yb, Lu) enclosing cavities occupied by the Ba and Cu atoms. Ba is 11-coordinate and Cu 5-coordinate, in a distored squarepyramidal environment.

Original languageEnglish
Pages (from-to)385-388
Number of pages4
JournalJournal of Solid State Chemistry
Volume89
Issue number2
DOIs
Publication statusPublished - 1 Jan 1990

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