High pressure structural study of {beta}-Ti{sub 3}O{sub 5}: X-ray diffraction and Raman spectroscopy

Journal Article · Wed Aug 15 00:00:00 EDT 2012 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2012.04.036· OSTI ID:22131143

Ye, Wu; Qian, Zhang ^[1]; Shan, Qin ^[1]; Jing, Liu ^[2]

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1. Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, Peking University and School of Earth and Space Sciences, Peking University, Beijing 100871 (China)
2. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)

The structural stability of {beta}-Ti{sub 3}O{sub 5} (C2/m) has been investigated by X-ray diffraction and Raman spectroscopy with diamond anvil cells. {beta}-Ti{sub 3}O{sub 5} is stable up to about 26 GPa at room temperature. Isothermal pressure-volume relationship of {beta}-Ti{sub 3}O{sub 5} is well presented by the third-order Birch-Murnaghan equation of state with V{sub 0}=348.6(8) A{sup 3} and B{sub 0}=216(9) GPa. Axial compressibility presents obvious anisotropy. The a-axis and c-axis are more compressible than b-axis due to the different crystal structure arrangement of {beta}-Ti{sub 3}O{sub 5} along b-axis and perpendicular to b-axis direction. The Grueneisen parameters of thirteen observed Raman modes are 0.79-1.74, whose mean is 1.32. - Graphical abstract: The crystal structure of {beta}-Ti{sub 3}O{sub 5}: the projection of {beta}-Ti{sub 3}O{sub 5} along b-axis (Left) and the projection of {beta}-Ti{sub 3}O{sub 5} along c-axis (Right). Highlights: Black-Right-Pointing-Pointer High pressure structural stability of {beta}-Ti{sub 3}O{sub 5} was investigated. Black-Right-Pointing-Pointer {beta}-Ti{sub 3}O{sub 5} is stable up to about 26 GPa. Black-Right-Pointing-Pointer Axial compressibility presents obvious anisotropy. Black-Right-Pointing-Pointer Pressure-volume relationship is well presented by Birch-Murnaghan equation of state. Black-Right-Pointing-Pointer The Grueneisen parameters are 0.79-1.74.

• OSTI ID: 22131143
• Journal Information: Journal of Solid State Chemistry, Vol. 192; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ANISOTROPY
EQUATIONS OF STATE
MONOCLINIC LATTICES
PRESSURE RANGE MEGA PA 10-100
RAMAN SPECTROSCOPY
TITANIUM OXIDES
X-RAY DIFFRACTION