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A neutron diffraction study of LaBa2Cu3O7−δ

Sequeira, A and Rajagopal, H and Rao, CNR and Ganapathi, L (1988) A neutron diffraction study of LaBa2Cu3O7−δ. In: Journal of Solid State Chemistry, 76 (1). pp. 235-239.

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Official URL: http://dx.doi.org/10.1016/0022-4596(88)90213-7


The correlation between structure and oxygen content in the LaBa2Cu3O7+δ was investigated by neutron powder diffraction. It is shown that the structure is orthorhombic (Pmmm) when δ = −0.04 and tetragonal (P4/mmm) when δ = −0.06. Such a change in structure accompanying a very small variation in oxygen stoichiometry is remarkable. In the orthorhombic structure of the δ = −0.04 sample, there is 70% oxygen occupancy for the linear chain site Image and 34% for the Image site. The La sites have 13.6% Ba when δ = −0.04 and 11.2% Ba when δ = −0.06; the Ba sites have 10% La in both cases.

Item Type: Editorials/Short Communications
Publication: Journal of Solid State Chemistry
Publisher: Elsevier science
Additional Information: Copyright of this article belongs to Elsevier science.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 01 Sep 2010 04:21
Last Modified: 19 Sep 2010 06:15
URI: http://eprints.iisc.ac.in/id/eprint/31600

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