首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >The quaternary arsenide oxides Ce9Au5-xAs8O6 and Pr9Au5-xAs8O6
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The quaternary arsenide oxides Ce9Au5-xAs8O6 and Pr9Au5-xAs8O6

机译:季砷氧化物Ce9Au5-xAs8O6和Pr9Au5-xAs8O6

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The quaternary gold arsenide oxides Ce9Au5-xAs8O6 and Pr9Au5-xAs8O6 were synthesized from the rare earth elements (RE), rare earth oxides, arsenic and gold powder at maximum annealing temperatures of 1173 K. The structures were refined from single crystal X-ray diffractometer data: Pnnm, a = 1321.64(6) pm, b = 4073.0(3), c = 423.96(2), wR2 = 0.0842, 3106 F-2 values, 160 variables for Ce9Au4.91(4)As8O6 and Pnnm, a = 1315.01(4), b = 4052.87(8), c = 420.68(1) pm, wR2 = 0.0865, 5313 F-2 values, 160 variables for Pr9Au4.75(1)As8O6. They represent a new structure type and show a further extension of pnictide oxide crystal chemistry. A complex polyanionic gold arsenide network [Au5As8](15-) (with some disorder in the gold substructure) is charge compensated with polycationic strands of condensed edge-sharing O@RE4/4 and O@RE4/3 tetrahedra ([RE4O3](2)(12+)) as well as RE3+ cations in cavities.
机译:由稀土元素(RE),稀土氧化物,砷和金粉在最高退火温度1173 K下合成了季砷化金氧化物Ce9Au5-xAs8O6和Pr9Au5-xAs8O6。单晶X射线衍射仪精制了结构数据:Pnnm,a = 1321.64(6)pm,b = 4073.0(3),c = 423.96(2),wR2 = 0.0842,3106 F-2值,Ce9Au4.91(4)As8O6和Pnnm的160个变量= 1315.01(4),b = 4052.87(8),c = 420.68(1)pm,wR2 = 0.0865,5313 F-2值,Pr9Au4.75(1)As8O6的160个变量。它们代表一种新的结构类型,并显示出氧化锡晶体化学的进一步扩展。复杂的聚阴离子砷化金网络[Au5As8](15-)(金的子结构有些紊乱)由缩合的边缘共享O @ RE4 / 4和O @ RE4 / 3四面体([RE4O3]( 2)(12+))以及腔中的RE3 +阳离子。

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