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|Title:||Laser Raman spectroscopic studies of order-disorder phase transitions in Na3BaCl5.2H2O crystals|
|Authors:||Swamy, M A Kandha|
Karanjikar, N P
|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.|
|ISSN:||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.40(09) [September 2002]|
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