In-situ high-pressure X-ray diffraction of natural beryl

At room temperature, in-situ high-pressure energy dispersive X-ray diffraction (EDXD) inspections on beryl has been carried out using diamond anvil cell (DAC) device with synchrotron radiation source. The maximal pressure in the experiment is 19.2 GPa. In the range of experimental pressure, no evidence for the phase transition of beryl was observed. However, the axial compressibility along c axis is larger than that along a axis. The volume compressibility could be described with Murnaghan equation of state in the range of room pressure to 9.3 GPa, while in 9.3-19.2 GPa, the volume compressibility shifts and increases with pressure in a nearly linear relationship.EI011-52