Published 1997 | Version v1
Journal article Metadata-only

Crystal structure and absorption spectra of some neptunium(4) decatungstates

Creators

  • 1. RAN, Inst. Fizicheskoj Khimii, Moscow (Russian Federation)
  • 2. RAN, Inst. Obshchej i Neorganicheskoj Khimii im. N.S. Kurnakova, Moscow (Russian Federation)

Description

Crystal structure of K4Na3H[Np(W5O18)2x16H2O (1) is determined: a = 18.862 (4), c = 28.233 (5) A, v = 10045(3) A3, sp.gr. P4/ncc, Z = 8; R 6.27% and Rw = 6.61% by 2997 independent reflections with I > 4σ(I). The basic structural unit is represented by heteropolyanions (HPA) [Np(W5O18)2]8-, joined by alkali metal cations and water molecules into a three-dimensional frame. The package is additionally stabilized by hydrogen bonds. The structure of Na8[Np(W5O18)2]x30H2O (2) id considered like the earlier investigated isostructural Na8[UW10O36]x30H2O (3). 1 and 2 electron absorption spectra (EAS) are studied in the crystalline state. They are completely identical

Additional details

Additional titles

Original title (Russian)
Kristallicheskoe stroenie i spektry pogloshcheniya nekotorykh dekavol'framatov neptuniya(4)

Publishing Information

Journal Title
Radiokhimiya
Journal Volume
39
Journal Issue
5
Journal Page Range
p. 423-428
ISSN
0033-8311
CODEN
RADKAU

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
29039713
Subject category
S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
Descriptors DEI
ABSORPTION SPECTRA; BOND ANGLE; BOND LENGTHS; CHEMICAL COMPOSITION; CRYSTAL LATTICES; HYDRATES; INTERATOMIC DISTANCES; LATTICE PARAMETERS; NEPTUNIUM COMPLEXES; POTASSIUM COMPOUNDS; SODIUM COMPOUNDS; TUNGSTATES
Descriptors DEC
ACTINIDE COMPLEXES; ALKALI METAL COMPOUNDS; COMPLEXES; CRYSTAL STRUCTURE; DISTANCE; OXYGEN COMPOUNDS; SPECTRA; TRANSITION ELEMENT COMPOUNDS; TRANSURANIUM COMPLEXES; TUNGSTEN COMPOUNDS

Optional Information

Notes
23 refs., 3 tabs., 3 figs.