Crystal structure of Nd{sub 2}BaCu{sub 3}O{sub 7.3} determined from x-ray and neutron powder diffraction data
In the present paper the authors report crystal structure of insulating compound Nd{sub 1.9}Ba{sub 1.1}Cu{sub 3}O{sub 7.28}--the Nd-rich terminating point of Nd{sub 1+x}Ba{sub 2{minus}x}Cu{sub 3}O{sub z} solid solutions. This phase has an orthorhombic lattice with a = 3.8565(1){angstrom}, b = 7.7724(3){angstrom}, c = 22.9862(8){angstrom}. The space group Ammm was determined on the basis of IR and Raman spectroscopic data and electron diffraction analysis. The crystal structure was solved and refined from the powder XRD and time-of-flight neutron diffraction data. Neodymium atoms on the barium site compared to conventional NdBa{sub 2}Cu{sub 3}O{sub 7} crystal are ordered and form a face-centered supercell, while additional oxygen atoms occupy vacant chain sites in the vicinity of barium atoms.
- Research Organization:
- Tokyo Inst. of Tech., Yokohama (JP)
- OSTI ID:
- 20014831
- Journal Information:
- Chemistry of Materials, Vol. 11, Issue 12; Other Information: PBD: Dec 1999; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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