Issue Information :
روزنامه با شماره پیاپی سال 2004
Pages :
6
From page :
473
To page :
478
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.
Journal title :
Acta Tropica
Serial Year :
2004
Journal title :
Acta Tropica
Record number :
1748568
Link To Document :
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