Steiner, Claudia and Andratschke, Martina and Range, Klaus-Jürgen (1996) An oxygen-rich neodymium cuprate: High-pressure synthesis and crystal structure of Nd12Cu6O25 (''Nd2CuO4.17''). ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 622 (8). pp. 1314-1318. ISSN 0044-2313, 1521-3749
Full text not available from this repository.Abstract
Single crystals of Nd12Cu6O25 (''Nd2CuO4.17'') could be obtained by reaction of Nd2O3 und CuO with KO2 in a modified Belt-type apparatus al. 40 kbar, 1500 degrees C. The compound crystallizes in the monoclinic space group C2/m with a = 17.128(6), b = 3.7288(6), c = 18.364(6) Angstrom, beta = 111.22(1)degrees and Z = 2. The structure refinement converged at R1 = 0.0302 for 1351 reflections with F-o > 4 sigma(F-o) and R1 = 0.0903, wR2 = 0.0767 for all 2571 data. The structure-determining feature are Cu(1,2)-O octahedral chains, interrupted by Cu(3) atoms in square-planar coordination. Each of this CuO4 groups is connected to another one, resulting in short copper-copper distances (d(Cu-Cu) = 3.012 Angstrom). A comparison of the structure of ''Nd2CuO4.17'' with those of La2CuO4 and Nd2CuO4 makes the structural relations of the former with La2CuO4 and, hence, the aristotype K2NiF4 evident, in spite of the close stoichiometric similarity between Nd2CuO4 and ''Nd2CuO4.17''.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LA2NIO4.25 LA8NI4O17; LA2CUO4; neodymium cuprate; excess oxygen; high-pressure synthesis; crystal structure |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Alumni or Retired Professors > Prof. Dr. Klaus-Jürgen Range |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 Jul 2023 07:39 |
| Last Modified: | 04 Jul 2023 07:39 |
| URI: | https://pred.uni-regensburg.de/id/eprint/51589 |
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