Mode of formation and stability of the A/sub n/B/sub n/O/sub 3n+2/ phases as evidenced by the systems La/sub 2/Ti/sub 2/O/sub 7/--CaTiO/sub 3/, Nd/sub 2/Ti/sub 2/O/sub 7/--CaTiO/sub 3/ and Ca/sub 2/Nb/sub 2/O/sub 7/--CaTiO/sub 3/ (in French)
Journal Article
·
· Mater. Res. Bull.; (United States)
The stability of the A/sub n/B/sub n/O/sub 3n+2/ phases, whose structure is derived from the perovskite structure, was investigated through x-ray diffraction, in the following systems: La/sub 2/Ti/sub 2/O/sub 7/--CaTiO/sub 3/, Nd/sub 2/Ti/sub 2/O/sub 7/--CaTiO/sub 3/ and Ca/sub 2/Nb/sub 2/O/sub 7/--CaTiO/sub 3/. Some of the phases quenched from the liquid are metastable and include vacancies over A and B sites. A model of formation of these phases is proposed.
- Research Organization:
- Laboratoire de Chimie du Solide Mineral, Paris, France
- OSTI ID:
- 6511239
- Journal Information:
- Mater. Res. Bull.; (United States), Journal Name: Mater. Res. Bull.; (United States) Vol. 12:9; ISSN MRBUA
- Country of Publication:
- United States
- Language:
- French
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Journal Article
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Thu Jan 14 23:00:00 EST 1999
· Materials Research Bulletin
·
OSTI ID:352416
Study of the incommensurability of (La/sub 4/Ca/sub 2/)Ti/sub 6/O/sub 20/ and (Nd/sub 4/Ca/sub 2/)Ti/sub 6/O/sub 20/, members n = 6 of the A/sub n/B/sub n/O/sub 3n + 2/ family: interpretation of the lattice modulation using a four-dimensional space
Journal Article
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Fri Feb 28 23:00:00 EST 1986
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OSTI ID:21043905
Related Subjects
36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CRYSTAL STRUCTURE
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
STABILITY
SYNTHESIS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CRYSTAL STRUCTURE
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
STABILITY
SYNTHESIS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS