Bastow, T.J. and Botton, G.A. and Etheridge, J. and Smith, M.E. and Whitfield, H.J. (1999) A study of Li2TiOSiO4 and Li2TiOGeO4 by X-ray powder and electron single-crystal diffraction, O-17 MAS NMR and O K-edge and Ti L-2,L-3-edge EELS. Acta Crystallographica Section A, 55 (1). pp. 127-132. ISSN 0108-7673.
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| Official URL http://dx.doi.org/10.1107/S0108767398006990 |
Abstract
X-ray powder and electron single-crystal diffraction of crystals of Li2TiOSiO4 and Li2TiOGeO4 showed them to be tetragonal, space group P4/nmm unit-cell parameters a = 6.4379(2), c = 4.40032 (2) Angstrom for Li2TiOSiO4 and a = 6.6110(8), c = 4.4372 (6) Angstrom for Li2TiGeO4. The compounds are isostructural with their sodium analogues but are considerably compressed along the c axis owing to the smaller size of lithium compared with sodium atoms. Square-pyramidal TiO5 groups are joined in these compounds by tetrahedral SiO4 and GeO4 groups, respectively. O-17 nuclear magnetic resonance spectra of the two compounds, isotopically enriched with O-17, showed peaks due to the apical titanyl, Ti-O, and basal, bridging, Ti-O-Si or Ti-O-Ge, oxygen atoms of the title compounds. By comparison with reference spectra, oxygen K edges and titanium L-2,L-3 edges of electron energy-loss spectra were tentatively assigned.
| Item Type: | Article |
|---|---|
| Subjects: | Q Science > QA Mathematics (inc Computing science) Q Science > QD Chemistry Q Science > QC Physics |
| Divisions: | Faculties > Science Technology and Medical Studies > School of Physical Sciences |
| Depositing User: | M. Nasiriavanaki |
| Date Deposited: | 23 Jul 2009 06:23 |
| Last Modified: | 23 Jul 2009 06:23 |
| Resource URI: | http://kar.kent.ac.uk/id/eprint/17057 (The current URI for this page, for reference purposes) |
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