Crystal structure of Cs/sub 4/(NpO/sub 2/)/sub 3/Cl/sub 6/(NO/sub 3/)H/sub 2/O: structure of the polymer with NpO/sub 2//sup +/-NpO/sub 2//sup +/ cation interaction (in Russian)
The crystal structure has been determined for a new Np(V) mixed-ligand coordination compound Np(V), Cs/sub 4/(NpO/sub 2/)/sub 3/Cl/sub 6/(NO/sub 3/)H/sub 2/O; the crystals are orthorhombic, lattice parameters a = 1.960 (5), b = 1.326 (4), c = 0.854 (2) nm, space group Cmc2/sub 1/, Z = 4, rho/sub calc/ = 4.91 g/cm/sup 3/. The structure has been determined by the heavy-atom method from three-dimensional photographic x-ray data and refined by full-matrix least squares in the isotropic-anisotropic approximation to R = 0.104. The structure consists of ((NpO/sub 2/)/sub 2/Cl/sub 4/NpO/sub 2/Cl/sub 2/(NO/sub 3/)H/sub 2/O)/sub n//sup 4n-/ anion layers parallel to the (010) planes, between which there are double layers of cesium cations. The polymeric anion contains two crystallochemically nonequivalent neptunium atoms having pentagonal coordination around the Np(1)O/sub 2//sup +/ and Np(2)O/sub 2//sup +/ oxocations. This structure is an example of reliable evidence for direct interaction between Np(V) complexes involving the oxygen atoms in neptunoyl groups. The (Np(1)O/sub 2/Cl/sub 4/O) bipyramids are linked via common Cl-Cl edges into polymeric strips, which are linked by bipyramidal (Np(2)O/sub 2/Cl/sub 2/(NO/sub 3/)H/sub 2/O) complexes into polymeric layers via common oxygen vertices belonging to Np(2)O/sub 2//sup +/. The Np(1)O/sub 2//sup +/ dioxocation is virtually linear and symmetrical, with Np(1)-O distances of 0.180(3) and 0.179 (3) nm, while < O-Np(1)-O=178 (2)/sup 0/. The dioxocation of the other type Np(2)O/sub 2/..mu.. is symmetrical (2(Np - O) = 0.185 (4) nm) but is not linear (< O-Np(2)-O=173 (3)/sup 0/). Other structure details are discussed together with the nature the nitrate ion.
- OSTI ID:
- 6715415
- Journal Information:
- Sov. Radiochem. (Engl. Transl.); (United States), Vol. 28:3; Other Information: Translated from Radiokhimiya; 28: No. 3, 304-311(May-June, 1986)
- Country of Publication:
- United States
- Language:
- Russian
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
CESIUM COMPLEXES
ORTHORHOMBIC LATTICES
STRUCTURAL CHEMICAL ANALYSIS
NEPTUNIUM COMPLEXES
BOND ANGLE
CHEMICAL COMPOSITION
CHLORIDES
COORDINATION NUMBER
COORDINATION VALENCES
CRYSTALLOGRAPHY
HYDRATES
INFRARED SPECTRA
INTERATOMIC DISTANCES
LATTICE PARAMETERS
NEPTUNIUM OXIDES
NITRATES
SPACE GROUPS
X-RAY DIFFRACTION
ACTINIDE COMPLEXES
ACTINIDE COMPOUNDS
ALKALI METAL COMPLEXES
CHALCOGENIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
COMPLEXES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
DISTANCE
HALIDES
HALOGEN COMPOUNDS
NEPTUNIUM COMPOUNDS
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SPECTRA
TRANSURANIUM COMPLEXES
TRANSURANIUM COMPOUNDS
VALENCE
400201* - Chemical & Physicochemical Properties
360602 - Other Materials- Structure & Phase Studies