Karmakar, Sukanta ; Sharma, Surinder M. (2004) High-pressure behavior of red mercuric iodide: in situ X-ray diffraction and optical absorption studies Solid State Communications, 131 (7). pp. 473-478. ISSN 0038-1098
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.ssc.2004.05.005
Abstract
We have investigated the behavior of red mercuric iodide (α-HgI2) under high pressures using in situ X-ray diffraction and optical absorption techniques. Our experimental results indicate that the tetragonal→orthorhombic phase transformation, observed at 1.4 GPa, is accompanied by an abrupt increase in the band gap while the nature of the gap does not change. However, across the orthorhombic →hexagonal phase transformation, observed at ~7.2 GPa, the gap decreases discontinuously and changes from direct to indirect type. These studies suggest that HgI2 may metallize at ~40 GPa, if not prevented by any other structural change.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Science. |
Keywords: | A. Mercuric Iodide; C. X-ray Diffraction; D. Optical Absorption; E. High Pressure 61.50.ks; 78.40.Fy; 61.10.Nz; 71.30.+h |
ID Code: | 48171 |
Deposited On: | 13 Jul 2011 14:24 |
Last Modified: | 13 Jul 2011 14:24 |
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