New substituted copper titanates with the CaCu/sub 3/Ti/sub 4/O/sub 12/ structure: Li(Cu/sub 3-x/Li/sub x/)(Ti/sub 3-x/M/sub 1 + x//sup v/)O/sub 12/ (M/sup V/ = Nb: 0. 12 less than or equal to x less than or equal to 0. 33; M/sup V/ = Ta: x 0. 33)
Journal Article
·
· J. Solid State Chem.; (United States)
New substituted copper titanates with the CaCu/sub 3/Ti/sub 4/O/sub 12/ perovskite-like structure were synthesized and characterized. Their formula is Li absolute value of Cu/sub 3-x/Li/sub x/ absolute value of Ti/sub 3-x/M/sub 1 + x//sup V/ O/sub 12/. There is a homogeneity range for M/sup V/ = Nb, 0.12 less than or equal to x less than or equal to 0.33, and a unique composition for M/sup V/ = Ta, x = 0.33. The unit cell is cubic: a approx. 2a/sub p/ (parameter of the ideal cubic cell) approx. 7.40 A. The CaCu/sub 3/Ti/sub 4/O/sub 12/-type structure was confirmed from an X-ray powder structural determination. Lithium occupies both square planar sites where it replaces copper and icosahedral sites, with a probable delocalization. Crystal chemistry of the AC/sub 3/B/sub 4/O/sub 12/ structure is considered, taking into account the evolution of anion packing and the distortion of polyhedra. A diagrammatic representation is proposed so that precise information on the regularity of the C/sub 3/B/sub 4/O/sub 12/ network can be obtained.
- Research Organization:
- Universite d'Orleans et C.R.P.H.T., France
- OSTI ID:
- 6545810
- Journal Information:
- J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 66:2; ISSN JSSCB
- Country of Publication:
- United States
- Language:
- English
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·
OSTI ID:6051608
Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
BOND ANGLE
BOND LENGTHS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DATA
DIFFRACTION
DIMENSIONS
EXPERIMENTAL DATA
INFORMATION
LATTICE PARAMETERS
LENGTH
LITHIUM COMPOUNDS
LITHIUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POWDERS
REFRACTORY METAL COMPOUNDS
SCATTERING
TANTALUM COMPOUNDS
TANTALUM OXIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
BOND ANGLE
BOND LENGTHS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DATA
DIFFRACTION
DIMENSIONS
EXPERIMENTAL DATA
INFORMATION
LATTICE PARAMETERS
LENGTH
LITHIUM COMPOUNDS
LITHIUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POWDERS
REFRACTORY METAL COMPOUNDS
SCATTERING
TANTALUM COMPOUNDS
TANTALUM OXIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION