Crystal structure of high-T-c related NdBaCuO2BO3: TEM and neutron powder diffraction study

Authors
Kopnin, EM Bougerol-Chaillout, C Belik, AA Schwer, H Bottger, G Karpinski, J
Citation
Em. Kopnin et al., Crystal structure of high-T-c related NdBaCuO2BO3: TEM and neutron powder diffraction study, PHYSICA C, 355(1-2), 2001, pp. 119-125
Citations number
19
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA C
ISSN journal
09214534 → ACNP
Volume
355
Issue
1-2
Year of publication
2001
Pages
119 - 125
Database
ISI
SICI code
0921-4534(20010601)355:1-2<119:CSOHRN>2.0.ZU;2-X
Abstract
The layered high-T-c related oxyborate NdBaCuO2BO3 has been investigated by ED, HREM and neutron powder diffraction. The crystal structure was refined using neutron data (space group P4bm, Z = 2, a = 5.52807(5) Angstrom, c = 7.44636(8) Angstrom; S = 0.981 R-p = 0.042, R-wp = 0.056, R-I = 0.030, R-F = 0.018). The main features of this structure are deformed (CuO5) square py ramids and triangular (BO3) groups which alternate along the 4-fold axis. B a and Nd atoms are completely ordered and coordinated by 12 and 8 oxygen at oms, respectively. (C) 2001 Elsevier Science B.V. All rights reserved.