TY  - JOUR
UR  - http://dx.doi.org/10.1107/S1600536814018698
SP  - 134 
TI  - Crystal structure of magnesium selenate heptahydrate, MgSeO7HO, from neutron time-of-flight data
N1  - 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.
ID  - discovery1449266
AV  - public
JF  - Acta Crystallographica Section E: Structure Reports Online
EP  -  137
N2  - 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.
IS  - 9
A1  - Fortes, AD
A1  - Gutmann, MJ
VL  - 70
Y1  - 2014/08/06/
ER  -