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  • Title: Elastic, magnetic and electronic properties of iridium phosphide Ir2P.
    Author: Wang P, Wang Y, Wang L, Zhang X, Yu X, Zhu J, Wang S, Qin J, Leinenweber K, Chen H, He D, Zhao Y.
    Journal: Sci Rep; 2016 Feb 24; 6():21787. PubMed ID: 26905444.
    Abstract:
    Cubic (space group: Fmm) iridium phosphide, Ir2P, has been synthesized at high pressure and high temperature. Angle-dispersive synchrotron X-ray diffraction measurements on Ir2P powder using a diamond-anvil cell at room temperature and high pressures (up to 40.6 GPa) yielded a bulk modulus of B0 = 306(6) GPa and its pressure derivative B0' = 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 [IrP4] 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 Ir2P with metallic, ionic, and covalent characteristics. In addition, a spin glass behavior is indicated by magnetic susceptibility measurements.
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