Preparation and crystal structures of plutonium(III) pentachloro complexes, K/sub 2/PuCl/sub 5/ and Rb/sub 2/PuCl/sub 5/
K/sub 2/PuCl/sub 5/ and Rb/sub 2/PuCl/sub 5/ were prepared by heating mixtures of anhydrous PuCl/sub 3/ and respective alkali metal chlorides in vacuum-sealed quartz ampoules at 400-500/sup 0/C. Their crystal structures are both orthorhombic with K/sub 2/PrCl/sub 5/-type structure (space group Pnma, Z = 4), determined by powder X-ray crystallography. K/sub 2/PuCl/sub 5/: lattice parameters a = 12,674 +/- 0.003, b = 8.727 +/- 0.002, c = 7.969 +/- 0.002 A; cell volume 220.4 +/- 0.2 A/sup 3/; X-ray density 3.726 +/- 0.004 g/cm/sup 3/. Rb/sub 2/PuCl/sub 5/: lattice parameters a = 13.093 +/- 0.008, b = 8.909 +/- 0.005, c = 8.178 +/- 0.005 A; cell volume 238.5 +/- 0.4 A/sup 3/; X-ray density 4.088 +/- 0.008 g/cm/sup 3/. Fourteen variable atom parameters of these complexes were obtained by electrostatic calculation with a program which maximizes the Madelung constant under the condition that the ion-ion separations in the crystal are all larger than respective critical distances. The measured Raman lines of Rb/sub 2/PuCl/sub 5/ are very close to those of hexachloride complexes. The bond lengths and stability of M/sub 2/PuCl/sub 5/ (M = K, Rb) are discussed.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 7257366
- Journal Information:
- J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 72:2; ISSN JSSCB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
BOND LENGTHS
CHEMICAL PREPARATION
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
CRYSTAL GROWTH
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
DIMENSIONS
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
INFORMATION
LASER SPECTROSCOPY
LATTICE PARAMETERS
LENGTH
NUMERICAL DATA
ORTHORHOMBIC LATTICES
PLUTONIUM CHLORIDES
PLUTONIUM COMPOUNDS
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
POWDERS
RAMAN SPECTROSCOPY
RUBIDIUM CHLORIDES
RUBIDIUM COMPOUNDS
SCATTERING
SPACE GROUPS
SPECTROSCOPY
STABILITY
SYNTHESIS
TRANSURANIUM COMPOUNDS
X-RAY DIFFRACTION