Nature of Th-F bonding in crystalline and glassy states using EXAFS and XANES

Journal Article · Thu Nov 01 04:00:00 EST 1984 · J. Solid State Chem.; (United States)

DOI:https://doi.org/10.1016/0022-4596(84)90254-8· OSTI ID:6066281

Rao, K J; Wong, J; Shafer, M W

A binary glass of thorium and hafnium tetrafluorides (with dopant concentrations of LaF/sub 3/) has been investigated using extended x-ray absorption fine structures (EXAFS) and x-ray absorption near edge structure (XANES) analysis of the L/sub III/ edge spectra of thorium. Results of EXAFS analysis indicate that there is no change in the number of nearest neighbors of thorium ions. However, the intensity of the white line in XANES is significantly higher in the glass. This increase in intensity has been explained semiquantitatively in terms of enhanced covalency of Th-F bonding. Since the coordination number of Th/sup 4 +/ remains constant in both crystalline and glassy states, covalency enhancement seems to be a general characteristic of glassy state of ionic materials.

• Research Organization: General Electric Corporate Research and Development, Schenectady, NY
• OSTI ID: 6066281
• Journal Information: J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 55:1; ISSN JSSCB
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400702 -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ABSORPTION SPECTRA
ACTINIDE COMPOUNDS
CHEMICAL BONDS
CRYSTALS
DATA
DOPED MATERIALS
EXPERIMENTAL DATA
FLUORIDES
FLUORINE COMPOUNDS
GLASS
HAFNIUM COMPOUNDS
HAFNIUM FLUORIDES
HALIDES
HALOGEN COMPOUNDS
INFORMATION
LANTHANUM COMPOUNDS
LANTHANUM FLUORIDES
MATERIALS
NUMERICAL DATA
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SPECTRA
THORIUM COMPOUNDS
THORIUM FLUORIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY SPECTRA