Fortes, AD;
Gutmann, MJ;
(2014)
Crystal structure of magnesium selenate heptahydrate, MgSeO7HO, from neutron time-of-flight data.
Acta Crystallographica Section E: Structure Reports Online
, 70
(9)
134 - 137.
10.1107/S1600536814018698.
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Abstract
MgSeO7HO is isostructural with the analogous sulfate, MgSO7HO, consisting of isolated [Mg(HO)]octahedra and [SeO]tetrahedra, linked by O - O hydrogen bonds, with a single interstitial lattice water molecule. As in the sulfate, the [Mg(HO)]coordination octahedron is elongated along one axis due to the tetrahedral coordination of the two apical water molecules; these have Mg - O distances of ∼2.10 Å, whereas the remaining four trigonally coordinated water molecules 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 MgSeO7HO 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.
| Type: | Article |
|---|---|
| Title: | Crystal structure of magnesium selenate heptahydrate, MgSeO7HO, from neutron time-of-flight data |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1107/S1600536814018698 |
| Publisher version: | http://dx.doi.org/10.1107/S1600536814018698 |
| Language: | English |
| Additional information: | This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1449266 |
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