摘要
In situ high-pressure experiments of Co2P are carried out by means of angle dispersive X-ray diffraction with diamond anvil cell technique. No phase transition is observed in the present pressure range up to 15 GPa at room temperature, even at high temperature and 15 GPa. Results of compression for Co2P are well presented by the second-order Birch-Murnaghan equation of state with V0 = 130.99（2） Aa （1 A=0.1 nm） and K0 = 160（3） GPa. Axial compressibilities are described by compressional modulus of the axis： Ka = 123（2） GPa, Kb = 167（8） GPa and Kc = 220（7） GPa. Theoretical calculations further support the experimental results and indicate that C23-type Co2P is stable at high pressure compared with the C22-type phase.
In situ high-pressure experiments of Co2P are carried out by means of angle dispersive X-ray diffraction with diamond anvil cell technique. No phase transition is observed in the present pressure range up to 15 GPa at room temperature, even at high temperature and 15 GPa. Results of compression for Co2P are well presented by the second-order Birch-Murnaghan equation of state with V0 = 130.99（2） Aa （1 A=0.1 nm） and K0 = 160（3） GPa. Axial compressibilities are described by compressional modulus of the axis： Ka = 123（2） GPa, Kb = 167（8） GPa and Kc = 220（7） GPa. Theoretical calculations further support the experimental results and indicate that C23-type Co2P is stable at high pressure compared with the C22-type phase.
基金
Project supported by the National Natural Science Foundation of China (Grant Nos. 40972029 and 41072027)
