Please use this identifier to cite or link to this item:
https://apo.ansto.gov.au/dspace/handle/10238/11081| Title: | The role of π-bonding on the high temperature structures in the uranium double perovskites Ba2CaUO6 and BaSrCaUO6 |
| Authors: | Reynolds, EM Thorogood, GJ Avdeev, M Brand, HEA Gu, QF Kennedy, BJ |
| Keywords: | Temperature range 0400-1000 K Uranium Perovskites X-ray diffraction Neutron diffraction Oxides |
| Issue Date: | 12-Aug-2015 |
| Publisher: | Royal Society of Chemistry |
| Citation: | Reynolds, E., Thorogood, G. J., Avdeev, M., Brand, H. E. A., Gu, Q., & Kennedy, B. J. (2015). The role of π-bonding on the high temperature structures in the uranium double perovskites Ba2CaUO6 and BaSrCaUO6. Dalton Transactions, 44(36), 16036-16044. doi:10.1039/C5DT02663F |
| Abstract: | The high temperature structural behaviour of the uranium perovskites Ba2CaUO6 and BaSrCaUO6 has been investigated using a combination of synchrotron X-ray and neutron powder diffraction. Ba2CaUO6 undergoes a complex sequence of structures associated with the progressive loss of cooperative octahedral tilting: P21/n → I2/m → I2/m → I4/m → Fm[3 with combining macron]m. The observation of the intermediate tetragonal structure, I4/m, in this, contrasts with the previously reported rhombohedral R[3 with combining macron] intermediate formed by the Ba2SrUO6 oxide. The importance of π-bonding in determining the structural sequence is discussed. © The Royal Society of Chemistry 2015 |
| URI: | https://doi.org/10.1039/C5DT02663F https://apo.ansto.gov.au/dspace/handle/10238/11081 |
| ISSN: | 1477-9234 |
| Appears in Collections: | Journal Articles |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.