In situ high-pressure X-ray diffraction experiments and ab initio calculations of Co_2P
In situ high-pressure X-ray diffraction experiments and ab initio calculations of Co_2P作者机构：Key Laboratory of Orogenic Belts and Crustal Evolution of Ministry of Education School of Earth and Space Sciences Peking University
出 版 物：《Chinese Physics B》 (中国物理B（英文版）)
年 卷 期：2011年第20卷第6期
页 面：336-341页
核心收录：
学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学]
主 题：Co2P1 ab initio pressure-induced phase transition
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.
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