A high pressure Raman study of 9-hydroxyphenalenone and pressure- induced phase transitions.
01 January 1987
The effect of pressure on 9-hydroxyphenalenone (9-HPLN) has been investigated using Raman scattering and optical absorption techniques in a diamond anvil cell up to 70 kbar hydrostatic pressure. A pressure-induced structural first-order phase transition occurs near 6 kbar and the Raman data shows that the transition is to the same phase that is obtained on cooling 9-HPLN below 255K at ambient pressure. The phase boundary has a positive slope with dT/dP = 7D K/kbar. The Raman data indicate that there may be another phase change near 50 kbar.