Steiner, Claudia and Andratschke, Martina and Range, Klaus-Jürgen (1996) Hochdrucksynthese und Kristallstruktur von Nd4Au2C9 und Gd4Au2C9 = High pressure synthesis and crystal structure of Nd4Au2O9 and Gd4Au2O9. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, 51 (6). pp. 811-816. ISSN 0932-0776, 1865-7117
Full text not available from this repository.Abstract
Single crystals of Nd4Au2O9 and Gd(4)AU(2)O(9) have been prepared by oxidizing mixtures of gold metal and Nd2O3 or Gd2O3, rsp., with KO2 under high-pressure high-temperature conditions (40 kbar, 1200 degrees C) in a modified Belt-type apparatus. The X-ray structure analyses have been carried out on twinned crystals. The compounds crystallize:ln the orthorhombic space group Pbcn (Nd4Au2O9: a = 11.938(7), b = 6.126(2), c = 11.928(3) Angstrom, Z = 4, R1 = 0.0443; Gd4Au2O9: a = 11.922(2), b = 6.1242(7), c = 11.917(2) Angstrom, Z = 4, R1 = 0.0232). The title compounds are isostructural with La4Au2O9. Their structure comprises isolated square-planar AuO4 groups, stacked along [010] to form a columnar structure. The Au-Au distance along the columnar direction is 3.10 Angstrom. Structural relations to Bi2CuO4 and (Nd,Pr)(2)AuO5 are discussed.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | lanthanoide aurates(III); high-pressure synthesis; crystal structure; columnar stacking |
| 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: | 06 Jul 2023 06:11 |
| Last Modified: | 06 Jul 2023 06:11 |
| URI: | https://pred.uni-regensburg.de/id/eprint/51698 |
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