An Investigation of Insulating La₄BaCu₅O₁₂ Obtained by the Reduction of Metallic La₄BaCu₅O_13.1

Autor:	Rangavittal, N., Subbanna, G. N., Row, T.N. Guru, Rao, C. N.R.
Zdroj:	Journal of Solid State Chemistry; January 1995, Vol. 114 Issue: 1 p95-101, 7p
Abstrakt:	The structure of insulating La4BaCu5O12 obtained by the reduction of metallic La4BaCu5O13.1 has been studied by using electron microscopy and high-resolution X-ray diffraction data. While La4BaCu5O13.1 (P4/m) has a tetragonal structure with the supercell ac5 × ac5 × ac, the reduced phase, La4BaCu5O12, is monoclinic (P2/m) with the supercell ac5 × ac × ac5. La4BaCu5O12 consists of CuO5 square pyramids and CuO4 square planar units, instead of CuO6 octahedra and CuO5 square pyramids as in La4BaCu5O13.1. Electron microscopic examination reveals the presence of twinning in some of the crystals of La4BaCu5O12. Copyright 1995, 1999 Academic Press
Databáze:	Supplemental Index
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