Growth and structural refinement of orthorhombic SrCuO{sub 2} crystals
Journal Article
·
· Journal of Solid State Chemistry
- Univ. of Tokyo (Japan)
Orthorhombic SrCuO{sub 2} single crystals are grown between 1050-950{degrees}C under ambient pressure using CuO self-flux method. SrCuO{sub 2}:M{sub r} = 183.16, orthorhombic, Cmcm(No.63), a = 3.577(1) {angstrom}, b = 16.342(1) {angstrom}, c = 3.9182(7) {angstrom}, Z = 4, D{sub x} = 5.311 g/cm{sup 3}, {mu}(MoK{alpha}) = 321.79 cm{sup {minus}1}, F(000) = 332.00. The anisotropic temperature factors converge to the values of R = 0.0289 and wR = 0.286 for 532 independent reflections. The crystal structure has two kinds of cation-polyhedral double layers of SrO{sub 7} and CuO{sub 4} that alternately connect parallel to the b axis direction, and the stacking along the c axis is closely related to the NaCl-like TII-type structure. The NaCl-related structure is formed by cell-twinning parallel to the (110){sub NaCl} direction. The periodic units (N) are 5 and the lengths (D) are 14.23 {angstrom} for the cations arrangements and 14.24 {angstrom} for the anion arrangements, respectively. The formula is determined to be Sr{sub 0.964}Cu{sup 2+} {sub 0.950}O{sub 1.91} from X ray refinements and bond-valence calculations.
- OSTI ID:
- 552743
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 114; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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