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This paper reports on the results of investigations into the phase composition of HgI2 microcrystals formed in the bulk and on the surface of different nanocrystalline matrices: pressed, finely dispersed (with a specific surface of more than 210 m2/g) aluminum oxide powders; porous borosilicate glasses with pore radii ranging from 2 to 20 nm; and Al2O3-HgI2 and SiO2-HgI2 nanocrystalline composites. The results of spectroscopic analysis (diffuse reflection, absorption, and luminescence spectroscopy) are complemented by the data of atomic-force microscopy (AFM) and x-ray diffraction. The experimental results indicate that nonequilibrium modifications, namely, the high-temperature yellow phase and the orange phase metastable in bulk crystals at all temperatures, can be stabilized in HgI2 nanoparticles at room temperature.
Translated title of the contribution | Формирование кристаллической фазы HgI2 в объеме и на поверхности нанокристаллических матриц |
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Original language | English |
Pages (from-to) | 1388-1393 |
Number of pages | 6 |
Journal | Physics of the Solid State |
Volume | 44 |
Issue number | 7 |
DOIs | |
State | Published - 1 Jul 2002 |
ID: 48583597