Preparation and crystal structure of a new uranium oxychloride: the dioxypentachlorodiuranium, U/sub 2/O/sub 2/Cl/sub 5/ (in French)
Journal Article
·
· J. Solid State Chem.; (United States)
The preparation of a new uranium oxychloride, U/sub 2/O/sub 2/Cl/sub 5/, is described. The compound is orthorhombic, Cmmm, with a = 8.431(3) A, b = 13.663(3) A, c = 4.106(2) A, Z = 2, Dm = 4.76 g cm/sup -3/, Dx = 4.81. The structure was solved from three-dimensional diffractometer data with Patterson and Fourier syntheses and full-matrix least-squares refinement. The final R value is 0.072 after absorption correction. The structure consists of (UCl/sub 4/2/Cl/sub 1/2/O/sub 2/2/)/sup infinity 2/ layers parallel to the (010) plane and linked in the b direction by bridging Cl atoms. The uranium atoms show noninteger formal valence while they are structurally equivalent; their coordination polyhedra are regular pentagonal bipyramids. Structural relationships among PaCl/sub 5/, ..beta..-U/sub 3/O/sub 8/, U/sub 2/O/sub 2/Cl/sub 5/, and RbIn/sub 2/F/sub 7/ are discussed in terms of MX/sub 7/ entities.
- Research Organization:
- Universite de Rennes I, France
- OSTI ID:
- 7101645
- Journal Information:
- J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 32:3; ISSN JSSCB
- Country of Publication:
- United States
- Language:
- French
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Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
CHEMICAL PREPARATION
CHLORINE COMPOUNDS
CRYSTAL STRUCTURE
HALOGEN COMPOUNDS
LATTICE PARAMETERS
OXYCHLORIDES
OXYGEN COMPOUNDS
SYNTHESIS
URANIUM COMPOUNDS
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
CHEMICAL PREPARATION
CHLORINE COMPOUNDS
CRYSTAL STRUCTURE
HALOGEN COMPOUNDS
LATTICE PARAMETERS
OXYCHLORIDES
OXYGEN COMPOUNDS
SYNTHESIS
URANIUM COMPOUNDS