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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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|
|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|
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