离子键合
体积模量
铱
材料科学
共价键
磷化物
剪切模量
同步加速器
结晶学
弹性模量
分析化学(期刊)
复合材料
金属
化学
光学
冶金
离子
生物化学
催化作用
色谱法
物理
有机化学
作者
Pei Wang,Yonggang Wang,Liping Wang,Xinyu Zhang,Xiaohui Yu,Jinlong Zhu,Shanmin Wang,Jiaqian Qin,Kurt Leinenweber,Haihua Chen,Duanwei He,Yusheng Zhao
摘要
Abstract Cubic (space group: Fm "Equation missing" m ) iridium phosphide, Ir 2 P, has been synthesized at high pressure and high temperature. Angle-dispersive synchrotron X-ray diffraction measurements on Ir 2 P powder using a diamond-anvil cell at room temperature and high pressures (up to 40.6 GPa) yielded a bulk modulus of B 0 = 306(6) GPa and its pressure derivative B 0 ′ = 6.4(5). Such a high bulk modulus attributed to the short and strongly covalent Ir-P bonds as revealed by first – principles calculations and three-dimensionally distributed [IrP 4 ] tetrahedron network. Indentation testing on a well–sintered polycrystalline sample yielded the hardness of 11.8(4) GPa. Relatively low shear modulus of ~64 GPa from theoretical calculations suggests a complicated overall bonding in Ir 2 P with metallic, ionic and covalent characteristics. In addition, a spin glass behavior is indicated by magnetic susceptibility measurements.
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