1 research outputs found
<span style="font-size: 22.0pt;mso-bidi-font-size:15.0pt;font-family:"Times New Roman","serif"; mso-bidi-font-weight:bold">Laser Raman spectroscopic studies of order-disorder phase transitions in Na<sub><span style="font-size:17.0pt;mso-bidi-font-size: 10.0pt;font-family:"Times New Roman","serif";mso-bidi-font-weight:bold">3</span></sub><span style="font-size:22.0pt;mso-bidi-font-size:15.0pt;font-family:"Times New Roman","serif"; mso-bidi-font-weight:bold">BaCl<sub><span style="font-size:17.0pt; mso-bidi-font-size:10.0pt;font-family:"Times New Roman","serif";mso-bidi-font-weight: bold">5</span></sub><span style="font-size:22.0pt;mso-bidi-font-size:15.0pt; font-family:"Times New Roman","serif";mso-bidi-font-weight:bold">.2H<sub>2</sub>O crystals </span></span></span>
650-653<span style="font-size:
15.5pt;mso-bidi-font-size:8.5pt;font-family:" times="" new="" roman","serif""="">Laser
Raman spectroscopic studies have been undenaken for Na<span style="font-size:17.0pt;
mso-bidi-font-size:10.0pt;font-family:" times="" new="" roman","serif";mso-bidi-font-weight:="" bold"="">3<span style="font-size:22.0pt;mso-bidi-font-size:15.0pt;
font-family:" times="" new="" roman","serif";mso-bidi-font-weight:bold"="">BaCl5<span style="font-size:22.0pt;
mso-bidi-font-size:15.0pt;font-family:" times="" new="" roman","serif";mso-bidi-font-weight:="" bold"="">.2H2O<span style="font-size:15.5pt;mso-bidi-font-size:
8.5pt;font-family:" times="" new="" roman","serif""=""> 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<span style="font-size:13.5pt;mso-bidi-font-size:6.5pt;
font-family:" arial","sans-serif""=""> t<span style="font-size:15.5pt;
mso-bidi-font-size:8.5pt;font-family:" times="" new="" roman","serif""="">he presence
studies.
</span