The pressure-induced phase transformation of CCl4 was studied with an x-ray and a Raman scattering experiments. The tranansition from the phase III to the phase IV takes place around 2.3 GPa. The space group of the phase IV is determined to be Pa3. Above 6 GPa, an intramolecular vibrational mode of F2 gradually splitted into three peaks. It suggests a phase transition to a new high pressure phase. [x-ray diffraction, Raman scattering, phase transformation, carbon tetrachloride, high pressure]
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