Phase Transition of Solid CF_4 under High Pressure
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X-ray powder diffraction and Raman scattering studies on solid CF<SUB>4</SUB> have been carried out under high pressure up to 12 GPa. The diffraction pattern of the phase III at 7. 5 GPa is assigned to a monoclinic lattice with lattice constants of a=6. 755, b=4. 401, c=6. 766 Å and β=103. 1 deg. For its space group, three different groups of P2<SUB>1</SUB>, P2<SUB>1</SUB>/m and P2<SUB>1</SUB>/c agree with experimental results. The frequency-pressure dependences of intramolecular vibratinal modes suggest a phase transition at 8. 6 GPa.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 802-804, 1998
The Japan Society of High Pressure Science and Technology