ANSTO Publications Online: Pressure-induced amorphization of La(1/3)NbO3

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/3991

Title:	Pressure-induced amorphization of La(1/3)NbO3
Authors:	Noked, O Yakovlev, S Greenberg, Y Garbarino, G Shuker, R Avdeev, M Sterer, E
Keywords:	Perovskite LITHIUM SPECTRA Raman Spectroscopy Niobium Oxides X-ray Diffraction
Issue Date:	15-Sep-2011
Publisher:	ELSEVIER
Citation:	Noked, O., Yakovlev, S., Greenberg, Y., Garbarino, G., Shuker, R., Avdeev, M., Sterer, E. (2011). Pressure-induced amorphization of La(1/3)NbO(3). Journal of Non-Crystalline Solids, 357(18), 3334-3337.
Abstract:	La(1/3)NbO(3), an A-site cation deficient double perovskite, has been studied under pressure by synchrotron X-ray powder diffraction and Raman spectroscopy. In contrast to other highly distorted perovskites, transforming to post-perovskite on compression, La(1/3)NbO(3) undergoes irreversible pressure induced amorphization at similar to 14.5 GPa. Over a wide range of pressure before that transition it presents an almost linear volume decrease versus pressure, accompanied by convergence form orthorhombic to a cubic unit cell. The Raman spectroscopy also shows an amorphization at the same pressure. However, where upon full decompression the X-ray diffraction pattern remains amorphous, new Raman peaks become active. (C) 2011 Elsevier B.V. All rights reserved.
URI:	http://dx.doi.org/10.1016/j.jnoncrysol.2011.05.030 http://apo.ansto.gov.au/dspace/handle/10238/3991
ISSN:	0022-3093
Appears in Collections:	Journal Articles

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