The crystal structure of Nb3AuHx
| Autor: | F. E. Wagner, B. Dorner, R. Wordel, G. Grosse, V.E. Antonov, A.I. Latynin, E.L. Bokhenkov, V. K. Fedotov |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Diffraction
Materials science Hydrogen Mechanical Engineering Alloy Neutron diffraction Metals and Alloys chemistry.chemical_element Nanotechnology Crystal structure engineering.material Crystallography chemistry Mechanics of Materials Formula unit X-ray crystallography Materials Chemistry engineering Neutron |
| Zdroj: | Journal of Alloys and Compounds. 264:1-7 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/s0925-8388(97)00237-5 |
| Popis: | The A15 alloy Nb 3 Au and its hydrides Nb 3 AuH x with x =2.9 and x =4.2 prepared at high hydrogen pressures were studied by neutron and X-ray diffraction. Their crystal structures were refined using the Rietveld method. Neutron diffraction showed that in both hydrides the hydrogen atoms occupy approximately 2.6 interstitial d sites of the 3 available per formula unit in the A15 metal lattice. The remaining hydrogen fills i sites. The X-ray examination revealed that the metal lattice of the Nb 3 Au alloy and its hydrides was partly disordered, with 8±1% of the regular Au positions randomly occupied by Nb. This atomic disorder is shown to be the cause of the observed maximum occupancy of d sites in the hydrides. |
| Databáze: | OpenAIRE |
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