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Advances in Physical Chemistry
Volume 2009 (2009), Article ID 180784, 11 pages
http://dx.doi.org/10.1155/2009/180784
Research Article

High-Pressure Synthesis and Study of and Ionic Solids

1Divisão de Metrologia de Materiais (DIMAT), Instituto Nacional de Metrologia, Normalização e Qualidade Industrial, Avenida Nossa Senhora das Graças 50, Xerém, Duque de Caxias, RJ, CEP 25250-020, Brazil
2Bayerisches Geoinstitut, Universität Bayreuth, 95440 Bayreuth, Germany
3Nikolaev Institute of Inorganic Chemistry SB RAS, Pr. Ac. Lavrentieva 3, 630090 Novosibirsk, Russia
4European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex 9, France

Received 2 April 2008; Revised 19 August 2008; Accepted 16 October 2008

Academic Editor: Lowell D. Kispert

Copyright © 2009 A. Yu. Kuznetsov et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nitrosonium-nitrate and dinitrogen pentoxide ionic crystals were synthesized by laser heating of a condensed oxygen-rich mixture compressed to different pressures, up to 40 GPa, in a diamond anvil cell (DAC). High-pressure/high-temperature Raman and X-ray diffraction studies of synthesized samples disclosed a transformation of compound to crystal at temperatures above ambient and pressures below 9 GPa. High-pressure experiments revealed previously unreported bands in Raman spectra of and ionic crystals. Structural properties of both ionic compounds are analyzed. Obtained experimental results support a hypothesis of a rotational disorder of complexes in and indicate a rotational disorder of ionic complexes in solid.