High-pressure phase transitions in the 6H perovskites Ba sub 3 MSb sub 2 O sub 9 (M = Mg, Ni, Zn)

Journal Article · Thu Mar 01 00:00:00 EST 1990 · Journal of Solid State Chemistry; (USA)

DOI:https://doi.org/10.1016/S0022-4596(05)80069-6· OSTI ID:7144137

Battle, P D; Jones, C W; Lightfoot, P ^[1]; Strange, R ^[2]

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1. Leeds Univ. (England)
2. SERC Daresbury Lab., Warrington (England)

The 6H perovskites Ba{sub 3}MSb{sub 2}O{sub 9} (M = Mg, Ni, Zn) have been subjected to pressures of up to 5.5 GPa. No structural phase transitions were observed in Ba{sub 3}MgSb{sub 2}O{sub 9}. Ba{sub 3}NiSb{sub 2}O{sub 9} transformed from a phase containing Sb{sub 2}O{sub 9} dimers formed by face-sharing octahedra into a phase containing NiSbO{sub 9} dimers. This was confirmed by a combination of x-ray powder diffraction and EXAFS. Ba{sub 3}ZnSb{sub 2}O{sub 9} transformed into a cubic perovskite with a partial ordering of zinc and antimony over the octahedral sites.

• OSTI ID: 7144137
• Journal Information: Journal of Solid State Chemistry; (USA), Vol. 85:1; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PEROVSKITES
PHASE TRANSFORMATIONS
X-RAY DIFFRACTION
ANTIMONY OXIDES
DATA ANALYSIS
EXPERIMENTAL DATA
HIGH PRESSURE
MAGNESIUM
MEASURING INSTRUMENTS
MEASURING METHODS
NICKEL
PRESSURE EFFECTS
ZINC
ALKALINE EARTH METALS
ANTIMONY COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
DATA
DIFFRACTION
ELEMENTS
INFORMATION
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SCATTERING
TRANSITION ELEMENTS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies