Crystal structure of complex neptunium(V) molybdate Na{sub 2}[(NpO{sub 2}){sub 2}(MoO{sub 4}){sub 2}H{sub 2}O] {center_dot} H{sub 2}O
- Institute of Physical Chemistry, Moscow (Russian Federation)
The crystal structure of Na{sub 2}[(NpO{sub 2}){sub 2}(MoO{sub 4}){sub 2}(MoO{sub 4}){sub 2}H{sub 2}O] {center_dot} H{sub 2}O (I) is determined (CAD-4 SDP automated diffractometer, {lambda}MoK{sub {alpha}}, graphite monochromator). Crystallographic data: a = 9.004(2) {angstrom}, b = 10.980(2) {angstrom}, c = 13.229(2) {angstrom}, {beta} = 102.46(2){degrees}, V = 1277.0(8) {angstrom}{sup 3}, space group P2{sub 1}/n, Z = 4, d(calcd.) = 4.89 g/cm{sup 3}, {mu}(MoK{sub alpha}) = 163 cm{sup -1}, R = 0.028, R{sub w} = 0.033 [for 1467 reflections with sin {theta}/{lambda} > 0.20 {angstrom}{sup -1} and I > 3{sigma}(I)]. The crystal structure of I is of the framework type. Coordination polyhedra of both crystallographically independent neptunium atoms are pentagonal bipyramids, which are combined in pairs sharing an edge through the coordination of one neptunyl ion by the other and a bridging oxygen atom of the molybdate moiety. MoO{sub 4} moieties act as tridentate and quadridentate bridges. One of the two water molecules is involved in the Np coordination sphere. The second water molecule and Na{sup +} ions are situated in the channels of a three-dimensional neptunyl-molybdate framework.
- OSTI ID:
- 182244
- Journal Information:
- Chemical and Petroleum Engineering, Journal Name: Chemical and Petroleum Engineering Journal Issue: 3-4 Vol. 31; ISSN CPTEAW; ISSN 0009-2355
- Country of Publication:
- United States
- Language:
- English
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