Ca tristannide

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 各种混合金属/非金属
• 英文名称: Ca tristannide
• 化学式: Sn₃Sr
• 分子量: 443.75
• InChiKey: DQTDKAWXFUSYOS-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -3.66
• 重原子数：
  4.0
• 可旋转键数：
  0.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0.0
• 氢给体数：
  0.0
• 氢受体数：
  0.0

反应信息

• 作为产物：
  描述：

  以 melt 为溶剂， 生成 tin 、 Ca tristannide
  参考文献：
  名称：

  SrSn₄: A Superconducting Stannide with Localized and Delocalized Bond Character

  摘要：

  The title compound is the tin-richest phase in the system Sr-Sn and is obtained by stoichiometric combination of the elements. SrSn4 peritecticly decomposes under formation of SrSn3 and Sn at 340 degreesC. The structure determined from a single crystal shows a new structure type with a novel structure motive in tin chemistry. It can be described by a corrugated, distorted quadratic net of tin atoms as the only building unit. The nets intersect at common Sn atoms, and the resulting channels host the Sr atoms. The structure can alternatively be described as an intergrowth structure of the AIB(2)-type and W-type. The atoms that are connected by the two shortest Sn-Sn distances (2.900 and 3.044 Angstrom) form a two-dimensional net consisting of hexagons of tin atoms. The hexagons have boat conformation in contrast to the rather similar alpha-As structure type, where hexagons have a chair conformation. Further tin atoms connect the two-dimensional net of Sn hexagons. Temperature-dependent magnetic susceptibility measurements show that SrSn4 is superconducting with T-c = 4.8 K at 10 G. LMTO band structure and density of states calculations verify the metallic behavior of SrSn4. An analysis of the electronic structure with the help of the electron localization function (ELF) shows that localized covalent bonds beside delocalized bonds coexist in SrSn4.

  DOI：

  10.1021/ic0302128

文献信息

• The phase diagram of the Sr–Sn system
  作者：A. Palenzona、M. Pani

  DOI：10.1016/j.jallcom.2004.04.097

  日期：2004.12

  The phase diagram of the Sr-Sn system was investigated over the whole compositional range by means of differential thermal analysis (DTA), X-ray diffraction (XRD), optical microscopy (LOM). All the already known intermediate phases: Sr2Sn (PbCl2-type), Sr5Sn3 (Cr5B3-type), SrSn (CrB-type), Sr3Sn5 (Pu3Pd5-type) SrSn3 (PuGa3-type) have been confirmed. Also the very new compound SrSn4, recently determined, could be confirmed in this work. Three eutectics occur in the system: at about 2.5 at.% Sn and 752degreesC, 45.5 at.% Sn and 1100degreesC and about 99.0 at.% Sn and 230degreesC. (C) 2004 Elsevier B.V. All rights reserved.
• Electron-poor SrAuxIn4−x (0.5⩽x⩽1.2) and SrAuxSn4−x (1.3⩽x⩽2.2) phases with the BaAl4-type structure
  作者：Andriy V. Tkachuk、Arthur Mar

  DOI：10.1016/j.jssc.2007.06.004

  日期：2007.8

  Solid solutions SrAuxIn4-x (0.5 <= x <= 1.2) and SrAuxSn4-x (1.3 <= x <= 2.2) have been prepared at 700 degrees C and their structures characterized by powder and single-crystal X-ray diffraction. They adopt the tetragonal BaAl4-type structure (space group I4/mmm, Z=2; SrAu1.1(1)In2.9(1), a=4.5841(2) angstrom, c= 12.3725(5) angstrom; SrAu1.4(1)Sn2.6(1), a=4.6447(7) angstrom, c= 11.403(2) angstrom), with An atoms preferentially substituting into the apical over basal sites within the anionic network. The phase width inherent in these solid solutions implies that the BaAl4-type structure can be stabilized over a range of valence electron counts (vec), 13.0-11.6 for SrAuxIn4-x and 14.1-11.4 for SrAuxSn4-x. They represent new examples of electron-poor BaAl4-type compounds, which generally have a vec of 14. Band structure calculations confirm that substitution of Au, with its smaller size and fewer number of valence electrons, for In or Sri atoms enables the BaAl4-type structure to be stabilized in the parent binaries SrIn4 and SrSn4, which adopt different structure types. (C) 2007 Elsevier Inc. All rights reserved.
• Faessler; Hoffmann, Zeitschrift für anorganische und allgemeine Chemie, 2000, vol. 626, # 1, p. 106 - 112
  作者：Faessler、Hoffmann

  DOI：——

  日期：——
• SrSn₄: A Superconducting Stannide with Localized and Delocalized Bond Character
  作者：Stefan Hoffmann、Thomas F. Fässler

  DOI：10.1021/ic0302128

  日期：2003.12.1

  The title compound is the tin-richest phase in the system Sr-Sn and is obtained by stoichiometric combination of the elements. SrSn4 peritecticly decomposes under formation of SrSn3 and Sn at 340 degreesC. The structure determined from a single crystal shows a new structure type with a novel structure motive in tin chemistry. It can be described by a corrugated, distorted quadratic net of tin atoms as the only building unit. The nets intersect at common Sn atoms, and the resulting channels host the Sr atoms. The structure can alternatively be described as an intergrowth structure of the AIB(2)-type and W-type. The atoms that are connected by the two shortest Sn-Sn distances (2.900 and 3.044 Angstrom) form a two-dimensional net consisting of hexagons of tin atoms. The hexagons have boat conformation in contrast to the rather similar alpha-As structure type, where hexagons have a chair conformation. Further tin atoms connect the two-dimensional net of Sn hexagons. Temperature-dependent magnetic susceptibility measurements show that SrSn4 is superconducting with T-c = 4.8 K at 10 G. LMTO band structure and density of states calculations verify the metallic behavior of SrSn4. An analysis of the electronic structure with the help of the electron localization function (ELF) shows that localized covalent bonds beside delocalized bonds coexist in SrSn4.