Fortes, Andrew Dominic and Gutmann, M.J. (2014) Crystal structure of magnesium selenate heptahydrate, MgSeO4·7H2O, from neutron time-of-flight data. Acta Crystallographica Section E: Structure Reports Online 70 (9), pp. 134-137. ISSN 1600-5368.
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Abstract
MgSeO4·7H2O is isostructural with the analogous sulfate, MgSO4·7H2O, consisting of isolated [Mg(H2O)6](2+) octa-hedra and [SeO4](2-) tetra-hedra, linked by O-H⋯O hydrogen bonds, with a single inter-stitial lattice water mol-ecule. As in the sulfate, the [Mg(H2O)6](2+) coordination octa-hedron is elongated along one axis due to the tetra-hedral coordination of the two apical water mol-ecules; these have Mg-O distances of ∼2.10 Å, whereas the remaining four trigonally coordinated water mol-ecules have Mg-O distances of ∼2.05 Å. The mean Se-O bond length is 1.641 Å and is in excellent agreement with other selenates. The unit-cell volume of MgSeO4·7H2O at 10 K is 4.1% larger than that of the sulfate at 2 K, although this is not uniform; the greater part of the expansion is along the a axis of the crystal.
Metadata
| Item Type: | Article |
|---|---|
| Keyword(s) / Subject(s): | crystal structure, hydrogen bonding, magnesium selenate heptahydrate, neutron Laue diffraction |
| School: | Birkbeck Faculties and Schools > Faculty of Science > School of Natural Sciences |
| Depositing User: | Administrator |
| Date Deposited: | 24 Nov 2014 14:30 |
| Last Modified: | 02 Aug 2023 17:14 |
| URI: | https://eprints.bbk.ac.uk/id/eprint/11100 |
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