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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >The Phosphides U_6Fe_(30)P_(19) and U_6Co_(30)P_(19) with the Yb_6Co_(30)P_(19) Structure Type
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The Phosphides U_6Fe_(30)P_(19) and U_6Co_(30)P_(19) with the Yb_6Co_(30)P_(19) Structure Type

机译:具有Yb_6Co_(30)P_(19)结构类型的磷化物U_6Fe_(30)P_(19)和U_6Co_(30)P_(19)

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摘要

Powders of U_6Fe_(30)P_(19) and U_6Co_(30)P_(19) were synthesized through the use of tin fluxes. Examination of these powders at 298 K by the Guinier technique led to lattice parameters in the hexagonal system for U_6Fe_(30)P_(19) of a = 14.762(2) ?, c = 3.6315(4) ?, c/a = 0.2460, V = 685.3 ?~3 and for U_6Co_(30)P_(19) of a = 14.722(3) ?, c = 3.6355(6) ?, c/a = 0.2469, V = 682.4 ?~3. Single crystals of U_6Fe_(30)P_(19) were synthesized and its structure was determined. U_6Fe_(30)P_(19) crystallizes in the space group C~1,_(3h) - P6-bar of the hexagonal system in the Yb_6Co_(30)P_(19) structure type with one formula unit in a cell of dimensions determined at 100 K of a = 14.7206(4) ?, c = 3.6243(1) ?, c/a = 0.2462, V = 680.15(4) ?~3. The asymmetric unit of U_6Fe_(30)P_(19) comprises two U, ten Fe, and seven different P atoms. Each U atom is situated in a trigonal prism of six P atoms;each Fe atom is coordinated either by a tetrahedron or a square pyramid of P atoms. The distances are all less than 2.9 ?. In addition, the structure contains numerous Fe-Fe bonds covering the range from 2.55 to 2.71 ?. The proper space group of the Yb_6Co_(30)P_(19) structure type is discussed.
机译:通过使用锡焊剂合成了U_6Fe_(30)P_(19)和U_6Co_(30)P_(19)的粉末。通过Guinier技术在298 K下对这些粉末进行检查,得出六方晶系中U_6Fe_(30)P_(19)的晶格参数a = 14.762(2)α,c = 3.6315(4)α,c / a = 0.2460 ,V =685.3Ω〜3,对于U_6Co_(30)P_(19),a = 14.722(3)Ω,c = 3.6355(6)Ω,c / a = 0.2469,V =682.4Ω〜3。合成了U_6Fe_(30)P_(19)单晶并确定了其结构。 U_6Fe_(30)P_(19)在Yb_6Co_(30)P_(19)结构类型的六边形系统的空间群C〜1,_(3h)-P6-bar中结晶,在一个单元格中具有一个公式单位在100 K下确定a = 14.7206(4)α,c = 3.6243(1)α,c / a = 0.2462,V = 680.15(4)α〜3。 U_6Fe_(30)P_(19)的不对称单元包含两个U,十个Fe和七个不同的P原子。每个U原子都位于六个P原子的三角棱柱中;每个Fe原子都由P原子的四面体或方锥配位。距离均小于2.9?。另外,该结构包含许多Fe-Fe键,覆盖范围为2.55至2.71Ω。讨论了Yb_6Co_(30)P_(19)结构类型的适当空间群。

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