In-situ non-ambient X-ray diffraction studies of indium tungstate

In-situ non-ambient X-ray diffraction studies of indium tungstate

In situ variable temperature and high pressure X-ray diffraction studies were carried out on indium tungstate (In2W3O12). This material displays positive volume expansion in both its low temperature monoclinic and high temperature orthorhombic phases, with negative thermal expansion along the a axis...

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Bibliographic Details
Published in:Journal of solid state chemistry Vol. 187; pp. 195 - 199
Main Authors: Baiz, Tamam I., Heinrich, Christophe P., Banek, Nathan A., Vivekens, Boris L., Lind, Cora
Format: Journal Article
Language:English
Published: Amsterdam Elsevier Inc 01-03-2012
Elsevier
Subjects:
Compressing
Condensed matter: structure, mechanical and thermal properties
Crystal structure
DIAMONDS
Diffraction
Exact sciences and technology
High pressure studies
INDIUM
Indium tungstate
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
MONOCLINIC LATTICES
Negative thermal expansion
Non-hydrolytic sol-gel process
ORTHORHOMBIC LATTICES
Orthorhombic phase
PHASE TRANSFORMATIONS
Physics
PRESSURE RANGE GIGA PA
PRESSURE RANGE MEGA PA 10-100
SOL-GEL PROCESS
Structure of solids and liquids; crystallography
Structure of specific crystalline solids
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0400-1000 K
THERMAL EXPANSION
Thermal expansion; thermomechanical effects and density
Thermal properties of condensed matter
Thermal properties of crystalline solids
TUNGSTATES
Variable temperature studies
X-RAY DIFFRACTION
X-rays
X-ray diffraction
Variable temperature studies
High pressure studies
Non-hydrolytic sol-gel process
Negative thermal expansion
Indium tungstate
Crystalline phase
Pressure effects
Amorphization
Volume expansion
XRD
High temperature
Indium
Monoclinic lattices
Tungstates
Phase transitions
High pressure
Irreversible processes
Thermal expansion
Orthorhombic lattices
Diamond anvil
Sol-gel process
Crystal structure
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Summary:In situ variable temperature and high pressure X-ray diffraction studies were carried out on indium tungstate (In2W3O12). This material displays positive volume expansion in both its low temperature monoclinic and high temperature orthorhombic phases, with negative thermal expansion along the a axis and positive thermal expansion along the b and c axes. Upon hydrostatic compression in a diamond anvil cell, one crystalline to crystalline phase transition is observed in the range 1.9 to 2.7GPa, and progressive irreversible amorphization occurs at pressures above 4.3GPa. The crystalline high pressure phase appears to be isostructural to previously observed high pressure phases in other A2M3O12 compounds. Variable pressure X-ray diffraction patterns of In2W3O12 collected in a diamond anvil cell. A phase transition is clearly observed between 2.2 and 2.7GPa, followed by irreversible amorphization. [Display omitted] ► The structure of In2W3O12 was studied as a function of temperature and pressure. ► Uniaxial negative thermal expansion was observed above 250°C. ► A pressure-induced phase transition occurred between 2.2 and 2.7GPa. ► Pressure-induced irreversible amorphization was observed above 4.3GPa.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2012.01.019