Murli, Chitra ; Sharma, Surinder M. ; Kulshreshtha, S. K. ; Sikka, S. K. (2001) High-pressure behavior of β-Ni (OH)2- a Raman scattering study Physica B: Condensed Matter, 307 (1-4). pp. 111-116. ISSN 0921-4526
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/S0921-4526(01)00646-9
Abstract
The existence of very short non-bonded H-H distances in β-Ni(OH)2 at ambient conditions, predisposes this compound towards a structural change at very low pressures. To investigate this, we have now carried out a high-pressure Raman scattering investigation on β-Ni(OH)2 up to 25 GPa. Our results show a monotonic stiffening of all the lattice modes and a small softening of hydroxyl symmetric stretch mode under pressure. Absence of any signature of a phase transformation up to 25 GPa and a reversible intrinsic broadening of the OH mode suggest that, even at the ambient conditions, β-Ni(OH)2 may be in the non-ideal CdI2 structure in which H-lattice is disordered.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | β-Ni(OH)2; Raman Scattering; High Pressure; Phase Transition |
| ID Code: | 48161 |
| Deposited On: | 13 Jul 2011 14:23 |
| Last Modified: | 12 Jul 2012 07:44 |
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