Mukherjee, G. D. ; Vijaykumar, V. ; Achary, S. N. ; Tyagi, A. K. ; Godwal, B. K. (2004) Phase transitions in Al2(WO4)3: high pressure investigations of low frequency dielectric constant and crystal structure Journal of Physics: Condensed Matter, 16 (41). pp. 7321-7330. ISSN 0953-8984
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Official URL: http://iopscience.iop.org/0953-8984/16/41/013
Related URL: http://dx.doi.org/10.1088/0953-8984/16/41/013
Abstract
Results of the low frequency dielectric constant (e), dielectric loss and x-ray powder diffraction (XRD) measurements on orthorhombic Al2(WO4)3 under pressure are reported. The dielectric constant and the dielectric loss both show a sharp peak at about 0.5 GPa, indicating a ferroelastic phase transformation. This phase is found to be identical to the low temperature monoclinic phase of Al2(WO4)3. Another monoclinic modification of Al2(WO4)3 is also observed from our XRD studies at 3.4 GPa. Al2(WO4)3 amorphizes above a pressure of 18 GPa, and this pressure induced amorphization is attributed to the lack of thermal activation for decomposition.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics Publishing. |
| ID Code: | 11953 |
| Deposited On: | 10 Nov 2010 06:45 |
| Last Modified: | 02 Jun 2011 08:51 |
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