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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >K_3FeSe_3 and K_3Fe_2Se_4, Two New Compounds in the System K/Fe/Se
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K_3FeSe_3 and K_3Fe_2Se_4, Two New Compounds in the System K/Fe/Se

机译:K_3FeSe_3和K_3Fe_2Se_4,K / Fe / Se系统中的两个新化合物

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The two selenides K_3FeSe_3 and K_3Fe_2Se_4 were synthesised by fusion reactions of potassium carbonate with iron and selenium in a stream of hydrogen charged with selenium at 695 deg C and 710-730 deg C, respectively. The crystal structures were determined by single-crystal X-ray diffractometer data. The atomic arrangement of K_3FeSe_3 is characterised by edge sharing [Fe_2Se_6] double tetrahedra separated by potassium ions (space group P2_1/c, Z=4). The characteristic structural unit of the mixed-valent compound K_3Fe_2Se_4 is a zig-zag chain of edge-sharing, iron-centred selenium tetrahedra, again separated by potassium ions (space groups Pnma, Z = 4).
机译:通过分别在695℃和710-730℃的充有硒的氢气流中碳酸钾与铁和硒的熔融反应,合成了两种硒化物K_3FeSe_3和K_3Fe_2Se_4。通过单晶X射线衍射仪数据确定晶体结构。 K_3FeSe_3的原子排列的特征是边共享[Fe_2Se_6]由钾离子隔开的双四面体(空间群P2_1 / c,Z = 4)。混合价化合物K_3Fe_2Se_4的特征结构单元是边缘共享的,以铁为中心的硒四面体的锯齿形链,又被钾离子隔开(空间群Pnma,Z = 4)。

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