铬酸锰 | 55392-76-2

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 过渡金属氧阴离子化合物
• 中文名称: 铬酸锰
• 中文别名: 锰铬酸盐
• 英文名称: Manganese (II) Chromate
• 英文别名: monochromate manganese；chromate manganese；manganese chromate；Chromic acid, manganese salt；dioxido(dioxo)chromium;manganese(2+)
• CAS: 55392-76-2
• 化学式: CrO₄*Mn
• 分子量: 170.932
• InChiKey: YPXVWYIINFOJPF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -2.62
• 重原子数：
  6
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  80.3
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  铬酸锰 在 NH₃ 作用下， 以 乙醇 、 水 为溶剂， 生成
  参考文献：
  名称：

  Narain, G.; Shukla, P., Journal of the Indian Chemical Society, 1966, vol. 43, p. 694 - 697

  摘要：

  DOI：
• 作为产物：
  描述：

  ammonium dichromate 、 manganese(II) nitrate 以 水 为溶剂， 反应 1.0h， 生成 铬酸锰
  参考文献：
  名称：

  Synthesis and Characterization of MnCrO₄, a New Mixed-Valence Antiferromagnet

  摘要：

  A new orthorhombic phase, MnCrO4, isostructural with MCrO4 (M = Mg, Co, Ni, Cu, Cd) was prepared by evaporation of an aqueous solution, (NH4)(2)Cr2O7 + 2 Mn(NO3)(2), followed by calcination at 400 degrees C. It is characterized by redox titration, Rietveld analysis of the X-ray diffraction pattern, Cr K edge and Mn K edge XANES, ESR, magnetic susceptibility, specific heat and resistivity measurements. In contrast to the high-pressure MnCrO4 phase where both cations are octahedral, the new phase contains Cr in a tetrahedral environment suggesting the charge balance Mn2+Cr6+O4. However, the positions of both X-ray absorption K edges, the bond lengths and the ESR data suggest the occurrence of some mixed-valence character in which the mean oxidation state of Mn is higher than 2 and that of Cr is lower than 6. Both the magnetic susceptibility and the specific heat data indicate an onset of a three-dimensional antiferromagnetic order at T-N approximate to 42 K, which was confirmed also by calculating the spin exchange interactions on the basis of first principles density functional calculations. Dynamic magnetic studies (ESR) corroborate this scenario and indicate appreciable short-range correlations at temperatures far above T-N center dot MnCrO4 is a semiconductor with activation energy of 0.27 eV; it loses oxygen on heating above 400 degrees C to form first Cr2O3 plus Mn3O4 and then Mn1.5Cr1.5O4 spinel.

  DOI：

  10.1021/ic401391b

文献信息

• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: Mn: MVol.D3, 13.1.2, page 21 - 23
  作者：

  DOI：——

  日期：——
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: Mn: MVol.D3, 12.2.13, page 19 - 20
  作者：

  DOI：——

  日期：——