In situ high pressure energy dispersive X-ray diffraction experiments have been carried out on C 3N 6H 6 by using diamond anvil cell (DAC) device with synchrotron radiation source. Two structural phase transitions of C 3N 6H 6 have been observed within 14.7GPa pressure range
from monoclinic to triclinic structure at 1.3GPa and from triclinic to orthorhombic structure at 8.2GPa