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首页> 外文期刊>Zeitschrift fur Kristallographie. Crystalline Materials >Novel Fluorido-Oxoanions via Lewis Acid-Base Reactions -Synthesis and Crystal Structure Determination of Na_3B_2PO_5F_4
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Novel Fluorido-Oxoanions via Lewis Acid-Base Reactions -Synthesis and Crystal Structure Determination of Na_3B_2PO_5F_4

机译：路易斯酸碱反应的新型氟代氧阴离子-Na_3B_2PO_5F_4的合成及晶体结构的确定

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摘要

Na_3B_2PO_5F_4 has been synthesized by an all-solid-state reaction between Na_3PO_4 and NaBF_4 and, alternatively by solid-gas reaction between Na_3PO_4 and BF_3. The new fluoridoboratophosphate is dimorphic. Monocli-nic Na_3B_2PO_5F_4-I (P2_1, a = 6.5230(6), b= 12.174(1), c = 8.8279(8) ?, ?= 102.322(5)°) and orthorhombic Na_3B_2PO_5F_4-II (Cmcm, a =12.175(2), b = 6.719(1), c = 9.077(1) ?) were obtained at 623 and 673 K, respectively. The latter is a dynamically or statically disordered polymorph of the former. Both modifications contain a cyclic six membered anion build up by three interconnected tetrahedra, i.e. one PO_4 and two BF_2O_2 units. These complex cyclo-anions feature the same number of valence electrons as cyclo-triphosphate [P_3O_9]~(3-) and fluoridooxidoborate [B_3O_3F_6]~(3-).
机译：Na_3B_2PO_5F_4是通过Na_3PO_4和NaBF_4之间的全固态反应，或者通过Na_3PO_4和BF_3之间的固-气反应合成的。新的氟硼硼磷酸盐是双晶的。单斜Na_3B_2PO_5F_4-I（P2_1 / n，a = 6.5230（6），b = 12.174（1），c = 8.8279（8）α，α= 102.322（5）°）和正交晶体Na_3B_2PO_5F_4-II（Cmcm，a分别在623K和673K下获得＝ 12.175（2），b ＝ 6.719（1），c ＝ 9.077（1）？）。后者是前者的动态或静态无序多态。两种修饰都包含由三个相互连接的四面体构成的环状六元阴离子，即一个PO_4和两个BF_2O_2单元。这些复杂的环阴离子具有与环三磷酸[P_3O_9]〜（3-）和氟氧化硼酸酯[B_3O_3F_6]〜（3-）相同的价电子数。

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