Metal-rich phosphides RE5Ir19P12 with Sc5Co19P12 type structure
Metal-rich phosphides RE5Ir19P12 with Sc5Co19P12 type structure
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DOI：
10.1016/j.jssc.2011.07.045
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发表时间：
2011-10
影响因子：
3.3
通讯作者：
U. Pfannenschmidt;U. Rodewald;R. Hoffmann;R. Pöttgen
中科院分区：
文献类型：
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作者：
U. Pfannenschmidt;U. Rodewald;R. Hoffmann;R. Pöttgen
The iridium-rich phosphides RE5Ir19P12(RE=Sc, Y, La–Nd, Sm–Lu) with Sc5Co19P12type structure, space group P62̄m were synthesized by solid state reactions of the elements in tantalum crucibles. Well shaped single crystals were obtained in bismuth fluxes. All phosphides were characterized on the basis of X-ray powder data. The structures of RE5Ir19P12with RE=Sc, La, Ce, Dy, Er, Tm, and Yb were refined from single crystal diffractometer data. The complex structure of these phosphides can be described by an intergrowth of simpler ThCr2Si2and SrPtSb related slabs. Striking structural motifs of the RE5Ir19P12structures are slightly distorted tricapped trigonal prisms of the metal atoms around the phosphorus atoms. The iridium and phosphorus atoms build up three-dimensional [Ir19P12] polyanionic networks (230–286pm Ir–P and 282–296pm Ir–Ir in La5Ir19P12) which leave cavities of coordination numbers 16 and 15 for the rare earth atoms.
