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Journal of Spectroscopy
Volume 2013, Article ID 956581, 6 pages
Research Article

Thermodynamical Quantities of Chalcogenide Dimers (O2, S2, Se2, and Te2) from Spectroscopic Data

1Saha's Spectroscopy Laboratory, Department of Physics, University of Allahabad, Allahabad 211 002, India
2The National Academy of Sciences, India, Allahabad 211 002, India

Received 29 June 2012; Accepted 13 August 2012

Academic Editor: Lars H. Boettger

Copyright © 2013 Shipra Tiwari 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.


Attempts have been made to calculate the thermodynamical quantities of diatomic molecules such as O2, S2, Se2, and Te2 from spectroscopic data with the help of partition function theory. The results have been calculated in the temperature range 100–3000°C. In order to increase accuracy of the calculated quantities, we have incorporated nonrigidity, anharmonicity, and stretching effects of molecules. The variation of these quantities with temperature have been studied and explained in terms of various modes of molecular motions.