Phase Transition in SnI_4 at High Pressure
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Synchrotron x-ray diffraction study of SnI<SUB>4</SUB> establishes a rich sequence of high-pressure structural transitions; 1st crystalline phase - 2nd crystalline phase - amorphous state - 3rd crystalline phase. Both metallization and amorphization proceed in the newly found 2nd phase stable above 7. 2 GPa. The 3rd crystalline phase exhibits a simple diffraction pattern that can be indexed only with the fcc lattice with the nearest interatomic distance of 3. 003±0. 001 Å at 61 GPa. This short distance is taken as evidence for pressure-induced dissociation of the SnI<SUB>4</SUB> molecules.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 278-280, 1998
The Japan Society of High Pressure Science and Technology