Study of the ordering of Sc and Ta atoms in Pb sub 2 ScTaO sub 6 by x-ray diffraction and high resolution electron microscopy

Journal Article · Wed Aug 01 00:00:00 EDT 1990 · Journal of Solid State Chemistry; (USA)

DOI:https://doi.org/10.1016/0022-4596(90)90033-T· OSTI ID:6447082

Kang, Z C; Boulesteix, C; Caranoni, C ^[1]; Siny, I ^[2]; Nihoul, G ^[3]

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1. CNRS, Marseille (France)
2. A. F. Ioffe Physico-Technical Institute, Leningrad (USSR)
3. Universite de Toulon et du Var, La Garde (France)

Single crystals of Pb{sub 2}ScTaO{sub 6} were grown by slow cooling of the melt. X-ray single crystal methods led to a cubic structure with a primitive unit cell with a = 4.07 {angstrom}. X-ray powder diffraction on crushed crystals reveals weak lines indicating some degree of ordering. High resolution electron microscopy (HREM) has been done along the (110) direction: ordered and disordered domains actually exist, with a domain size between a few angstroms and roughly 1,000 {angstrom}. In the present case ordered domains were just at the limit of detection by x-ray methods. It has been shown that high resolution electron microscopy is a powerful method for the study of ordering, especially in the case of small domains.

• OSTI ID: 6447082
• Journal Information: Journal of Solid State Chemistry; (USA), Vol. 87:2; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FERROELECTRIC MATERIALS
TITANATES
MICROSTRUCTURE
CUBIC LATTICES
EXPERIMENTAL DATA
LEAD
MEASURING INSTRUMENTS
MEASURING METHODS
SCANDIUM
X-RAY DIFFRACTION
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
ELEMENTS
INFORMATION
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
SCATTERING
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies