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Title: Laser Raman spectroscopic studies of order-disorder phase transitions in Na3BaCl5.2H2O crystals
Authors: Swamy, M A Kandha
Srinivasan, V
Venkateswaran, Sugandhi
Thomas, Susy
Karanjikar, N P
Issue Date: Sep-2002
Publisher: NISCAIR-CSIR, India
Abstract: Laser Raman spectroscopic studies have been undenaken for Na3BaCl5.2H2O single crystals to study the structural phase transitions taking place in them through spectra- structure correlation. The spectral changes that take place in the low temperature phase below 267 K in this crystal in terms of intensity and bandwidth or the streching and librational modes show that these are indications or diffuse phase transitions associated with an order-disorder mechanism which involves the rotation or water molecules, freezing ¬†below 267 K. No evidence of soft modes has been found for the crystal in the temperature region of the presence studies.
Page(s): 650-653
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.40(09) [September 2002]

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