Nagabhushana, H and Nagabhushana, B M and Lakshminarasappa, B N and Singh, Fouran and Chakradhar, R P S (2009) Swift heavy ion irradiation induced phase transformation in calcite single crystals. Solid State Communications, 149 (43-44). pp. 1905-1908. ISSN 0038-1098

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Ion irradiation induced phase transformation in calcite single crystals have been studied by means of Raman and infrared spectroscopy using 120 MeV Au(9+) ions. The observed bands have been assigned according to group theory analysis. For higher fluence of 5 x 10(12) ion/cm(2), an extra peak on either side of the 713 cm(-1) peak and an increase in the intensity of 1085 cm(-1) peak were observed in Raman studies. FTIR spectra exhibit extra absorption bands at 674 1589 cm(-1) and enhancement in bands at 2340 and, 2374 cm(-1) was observed. This might be due to the phase transformation from calcite to vaterite. The damage cross section (sigma) for all the Raman and FTIR active modes was determined. The increase of FWHM, shift in peak positions and appearance of new peaks indicated that calcite phase is converted into vaterite. (C) 2009 Elsevier Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Quasicrystals; Dislocations and disclinations; Phase transitions; Atom, molecule, and ion impact
Subjects: Crystal Chemistry, Thermodynamics, Phase Equilibria
Divisions: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 29 Feb 2012 12:00
Last Modified: 29 Feb 2012 12:00

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