Structural chemistry of Au(III)-substituted Ba2YCu3O7−δ
| Autor: | J. J. Pouch, Paul D. Hambourger, James R. Gaier, Aloysius F. Hepp |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
Copper oxide
Crystal chemistry Inorganic chemistry Formal charge Crystal structure Condensed Matter Physics Electron spectroscopy Electronic Optical and Magnetic Materials Inorganic Chemistry Metal Crystallography chemistry.chemical_compound chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Physical and Theoretical Chemistry Stoichiometry Perovskite (structure) |
| Zdroj: | Journal of Solid State Chemistry. 74:433-437 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/0022-4596(88)90377-5 |
| Popis: | A series of gold-substituted perovskite superconductorsBa2Y(Cu1−xAux)3O7−δ (x = 0–0.1) was synthesized. Forx = 0.1 there was no change in thea andb lattice parameters (a = 3.826A˚andb = 3.889A˚) but a 0.06A˚c axis expansion to 11.75A˚was observed. Substituted gold was found to be trivalent by X-ray photoelectron spectroscopy. Replacing Cu(1) in the copper oxide chain with a slight reordering of oxygen is consistent withc axis expansion. The formal charge of the site remains trivalent while remaining Cu in the chains is reduced to Cu(I) resulting in an oxygen stoichiometry |
| Databáze: | OpenAIRE |
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