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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Synthesis and Characterization of Manganese Tetrafluoride β-MnF_4
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Synthesis and Characterization of Manganese Tetrafluoride β-MnF_4

机译：锰四氟化锰β-MNF_4的合成与表征

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摘要

The crystal structure of β-MnF_4 has finally been elucidated. It crystallizes in the non-centrosymmetric space group R3c, no. 161, hR360, with the lattice parameters a = 19.390(3), c = 12.940(3) ?, V = 4213.3(14) ?~3, Z = 72, T = 100 K. It is a 4a×4a superstructure of the VF_3 (FeF_3) structure type. The Mn atoms are coordinated octahedron- like by F atoms, of which two are bound terminal, while the other act as μ-bridging F atoms to other Mn atoms forming a threedimensional infinite network structure which can be described by the Niggli formula _∞~3[MnF_(4/2)F_(2/1)]. Voids on the metal sites, which are occupied in the VF_3 structure, are grouped together in the shape of a "star" with approximate D_(3h) symmetry. We prepared β-MnF_4 photochemically according to the literature and obtained a phase-pure powder as evidenced by X-ray diffraction at room temperature. The lattice parameters are a = 19.566(3), c = 12.984(2) ?, V = 4304(1) ?~3. IR and Raman spectra recorded on the powder show that β-MnF_4 has also been obtained free of moisture, HF, and O_2~+ containing compounds, however MnF_3 is likely present as a magnetic impurity. We observe thermal decomposition of MnF_4 to MnF_2 and not MnF_3.
机译：β-MnF_4的晶体结构已被阐明。它在非中心对称空间群R3c中结晶，编号161，hR360，晶格参数a=19.390（3），c=12.940（3）？，V=4213.3（14）~3，Z=72，T=100K。它是VF_3（FeF_3）结构类型的4a×4a上部结构。Mn原子是由F原子配位的八面体，其中两个是结合端，而另一个作为μ-桥连F原子与其他Mn原子，形成一个三维无限网络结构，可以用Niggli公式描述_∞~3[MnF_u（4/2）F_（2/1）]。在VF_3结构中占据的金属位置上的空洞以具有近似D_（3h）对称性的“星”形状组合在一起。根据文献报道，我们用光化学方法制备了β-MnF_4，并在室温下通过X射线衍射得到了相纯粉末。晶格参数为a=19.566（3），c=12.984（2）？，V=4304（1）~3.粉末上记录的红外光谱和拉曼光谱表明，β-MnF_4也不含水分、HF和含O_2+的化合物，但MnF_3可能是一种磁性杂质。我们观察到MnF_4的热分解为MnF_2，而不是MnF_3。

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    Florian Kraus; Sergei I. Ivlev; Jascha Bandemehr; Malte Sachs; Clemens Pietzonka; Matthias Conrad; Michael Serafin; Bernd G. Müller;

  • 作者单位

    Anorganische Chemie Fluorchemie Fachbereich Chemie Philipps-Universit?t Marburg Hans-Meerwein-Str. 4 35032 Marburg Germany;

    Anorganische Chemie Fluorchemie Fachbereich Chemie Philipps-Universit?t Marburg Hans-Meerwein-Str. 4 35032 Marburg Germany;

    Anorganische Chemie Fluorchemie Fachbereich Chemie Philipps-Universit?t Marburg Hans-Meerwein-Str. 4 35032 Marburg Germany;

    Anorganische Chemie Fluorchemie Fachbereich Chemie Philipps-Universit?t Marburg Hans-Meerwein-Str. 4 35032 Marburg Germany;

    Anorganische Chemie Fluorchemie Fachbereich Chemie Philipps-Universit?t Marburg Hans-Meerwein-Str. 4 35032 Marburg Germany;

    Anorganische Chemie Fluorchemie Fachbereich Chemie Philipps-Universit?t Marburg Hans-Meerwein-Str. 4 35032 Marburg Germany;

    Anorganische Chemie Fluorchemie Fachbereich Chemie Philipps-Universit?t Marburg Hans-Meerwein-Str. 4 35032 Marburg Germany;

    Anorganische Chemie Fluorchemie Fachbereich Chemie Philipps-Universit?t Marburg Hans-Meerwein-Str. 4 35032 Marburg Germany;

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  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

    Fluorine; Manganese; Manganese tetrafluoride; IR spectroscopy; Raman spectroscopy;

    机译：氟;锰;锰四氟化物;IR光谱;拉曼光谱;

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