High-pressure Raman study of solid hydrogen up to 300 GPa
Huang Xiaoli, Li Fangfei, Huang Yanping, Wu Gang, Li Xin, Zhou Qiang, Liu Bingbing, Cui Tian†, 
Optical microscopy images of solid hydrogen sample at (a) 92 GPa with transmitted and reflected white light and (b) 92 GPa with transmitted white light, at (c) 225 GPa with transmitted and reflected white light and (d) 225 GPa with transmitted white light, at (e) 304 GPa with transmitted and reflected white light. The diamond crushed at 304 GPa after measuring the Raman spectra, shown in panel (f).
