Crystal chemistry of the new rare-earth sodium borates Na/sub 3/Ln(BO/sub 3/)/sub 2/(Ln = La, Nd)
Journal Article
·
· J. Solid State Chem.; (United States)
The ternary borate systems Na/sub 2/O-Ln/sub 2/O/sub 3/-B/sub 2/O/sub 3/ (Ln = La, Nd) have been investigated in view of obtaining high-neodymium-concentration materials with weak concentration quenching. A ternary phase of composition Na/sub 3/Ln(BO/sub 3/)/sub 2/ (Ln = La, Nd) has been found. It crystallizes in the monoclinic space group P2/sub 1//c. The structure has been determined for Na/sub 3/Nd(BO/sub 3/)/sub 2/. A full-matrix least-squares refinement led to R = 0.040. The structure is formed by isolated BO/sub 3/ triangles held together by the neodymium and sodium ions. The rare-earth atoms have a complex eightfold coordination in a covalent BO/sub 3/ matrix.
- Research Organization:
- Bordeaux-1 Univ., Talence, France
- OSTI ID:
- 6044619
- Journal Information:
- J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 39:3; ISSN JSSCB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
BORATES
BORON COMPOUNDS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
DENSITY
DIFFRACTION
DISTANCE
EXPERIMENTAL DATA
INFORMATION
INTERATOMIC DISTANCES
LANTHANUM COMPOUNDS
LATTICE PARAMETERS
MELTING POINTS
MONOCLINIC LATTICES
NEODYMIUM COMPOUNDS
NUMERICAL DATA
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
SODIUM COMPOUNDS
SYNTHESIS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
BORATES
BORON COMPOUNDS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
DENSITY
DIFFRACTION
DISTANCE
EXPERIMENTAL DATA
INFORMATION
INTERATOMIC DISTANCES
LANTHANUM COMPOUNDS
LATTICE PARAMETERS
MELTING POINTS
MONOCLINIC LATTICES
NEODYMIUM COMPOUNDS
NUMERICAL DATA
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
SODIUM COMPOUNDS
SYNTHESIS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
X-RAY DIFFRACTION