Crystalline-Amorphous Transition of LiB3O5 under High Pressure

Pressure induced amorphous transition of LiB3O5 (LBO) has been investigated by using in situ high pressure X-ray powder diffraction and energy dispersive X-ray diffraction with synchrotron radiation at the pressure up to 45.1 GPa. According to the experimental results, LBO undergoes two intermediate phase transitions at pressure of about 5 and 15.8 GPa, respectively. But LBO crystal becomes an amorphous phase in the pressure range of about 25～31.6 GPa and this amorphous transition is irreversible.