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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >A new example of the structure type A_2[{Z_2R _4}X_9]: Synthesis and crystal structure of Na _2[{(ON)Ce_4}Cl_9]
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A new example of the structure type A_2[{Z_2R _4}X_9]: Synthesis and crystal structure of Na _2[{(ON)Ce_4}Cl_9]

机译:结构类型A_2 [{Z_2R _4} X_9]的新示例:Na _2 [{(ON)Ce_4} Cl_9]的合成和晶体结构。

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摘要

First single crystals of Na_2[{(ON)Ce_4}Cl_9] were obtained during synthesis attempts for the cerium nitride chloride Ce _2NCl_3 (= (N_2Ce_4)Cl_6). With a molar ratio of 8:10:3 for Ce, CeCl_3 and NaN_3 along with an excess of the flux NaCl, the mixture obviously contained a small amount of CeOCl that led to the formation of quinary Na_2[{(ON)Ce _4)Cl_9]. It crystallizes in the monoclinic space group P2_1/m (no. 11) with two formula units in the unit cell with dimensions of a = 813.21(6) pm, b = 1146.13(9) pm, c = 942.86(7) pm and β = 107.504(5) °. As the dominating structural feature {ZCe_4) ~(9.5+) tetrahedra are fused through fraw-oriented edges to generate {ZCe_(4/2)~e}~(3.5+) chains (Z= 1/2 O + 1/2 N) just as in the structurally isotypic compounds A_2[ {Z_2R _4}X_9] (A = Na, K; R = Pr, Nd, Gd; X= Cl, Br; Z = O, O/N).
机译:在尝试合成氯化铈铈Ce _2NCl_3(=(N_2Ce_4)Cl_6)的过程中,获得了Na_2 [{{(ON)Ce_4} Cl_9]的第一单晶。当Ce,CeCl_3和NaN_3的摩尔比为8:10:3​​以及过量的NaCl助熔剂时,该混合物显然包含少量CeOCl,从而导致生成五元Na_2 [{(ON)Ce _4) Cl_9]。它在单斜晶空间群P2_1 / m(第11号)中结晶,在晶胞中具有两个公式单位,尺寸分别为a = 813.21(6)pm,b = 1146.13(9)pm,c = 942.86(7)pm和β= 107.504(5)°。由于占主导地位的结构特征{ZCe_4)〜(9.5+)四面体通过面向分枝的边缘融合而生成{ZCe_(4/2)〜e}〜(3.5+)链(Z = 1/2 O + 1/2 N)就像结构同型化合物A_2 [{Z_2R _4} X_9](A = Na,K; R = Pr,Nd,Gd; X = Cl,Br; Z = O,O / N)一样。

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