Pressure-induced transition in Tl{sub 2}MoO{sub 4}

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.08.036· OSTI ID:21494110

Machon, Denis ^[1]; Friese, Karen ^[2]; Breczewski, Tomasz ^[3]; Grzechnik, Andrzej ^[2]

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1. Universite de Lyon, F-69000, France - Univ. Lyon 1, Laboratoire PMCN, CNRS, UMR 5586, F-69622 Villeurbanne Cedex (France)
2. Departamento de Fisica de la Materia Condensada, Facultad de Ciencia y Tecnologia, Universidad del Pais Vasco, Apartado 644, 48080 Bilbao (Spain)
3. Departamento de Fisica Aplicada II, Facultad de Ciencia y Tecnologia, Universidad del Pais Vasco, Apartado 644, 48080 Bilbao (Spain)

Tl{sub 2}MoO{sub 4} has been studied under high-pressure by X-ray diffraction, Raman spectroscopy, and optical absorption measurements. A first-order phase transition is observed at 3.5{+-}0.5 GPa. The nature (ordered vs. disordered) of the high-pressure phase strongly depends on the local hydrostatic conditions. Optical absorption measurements tend to show that this transition is concomitant with an electronic structure transformation. Prior to the transition, single crystal X-ray diffraction shows that pressure induces interactions between MoO{sub 4} fragments and the Mo coordination number tends to increase. In addition, the stereoactivity of the lone-pair electrons on the three symmetrically independent Tl-sites is not uniform; while for two sites the stereoactivity decreases with increasing pressures for the third site the stereoactivity increases. - Graphical Abstract: (up) Structural evolutions of Tl{sub 2}MoO{sub 4} in the low-pressure phase. (Down) Optical properties of the high-pressure phase as a function of pressure. Display Omitted

• OSTI ID: 21494110
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 11; Other Information: DOI: 10.1016/j.jssc.2010.08.036; PII: S0022-4596(10)00370-1; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
COORDINATION NUMBER
ELECTRONIC STRUCTURE
INTERACTIONS
MOLYBDATES
MONOCRYSTALS
OPTICAL PROPERTIES
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
RAMAN SPECTROSCOPY
THALLIUM COMPOUNDS
TRANSFORMATIONS
X-RAY DIFFRACTION
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
LASER SPECTROSCOPY
MOLYBDENUM COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRESSURE RANGE
REFRACTORY METAL COMPOUNDS
SCATTERING
SORPTION
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS