Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1332791 | Journal of Solid State Chemistry | 2006 | 5 Pages |
A novel mixed valent tellurium oxide, SrTe3O8, has been synthesized and its crystal structure was determined ab initio from powder X-ray diffraction data. This oxide, which crystallizes in a tetragonal unit-cell, P42/m space group, with very close a and c cell parameters (6.8257(1) and 6.7603(1) Å, respectively), exhibits a very original structure built up of corner-sharing TeO6 (Te6+) octahedra and Te2O8 (Te4+) twin-pyramidal units. The latter ones form [Te3O8]∞ chains running along the [001] and the [110] directions. Besides the four sided tunnels where the Sr2+ cations are located, there are very large four sided tunnels running along the c-axis which are obstructed by the electronic lone pairs of the Te4+ cations.
Graphical abstractTunnel structure of the mixed valent tellurate SrTe3O8 determined ab initio against powder X-ray diffraction; structure viewed along [001] direction with E the electronic lone pairs of the Te4+ cations.Figure optionsDownload full-size imageDownload as PowerPoint slide