The Pentasulfates A₂[S₅O₁₆] (A = Li, Na, Cs, Ag): Rare Species by Reactions in SO₃

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• 作者：Lisa Verena Schindler ; Mona Struckmann ; Anna Becker and Mathias S. Wickleder
• 刊名：European Journal of Inorganic Chemistry
• 出版年：2017
• 出版时间：February 03, 2017
• 年：2017
• 卷：2017
• 期：5
• 页码：958-964
• 全文大小：1067K
• ISSN：1099-0682c

文摘

The reaction of various sulfate salts A₂SO₄ (A = Li, Na, Ag, Cs) with neat SO₃ led to the respective pentasulfates A₂[S₅O₁₆] {Li₂[S₅O₁₆]: monoclinic, C2/c, Z = 4, a = 1850.71(7) pm, b = 665.45(2) pm, c = 992.80(4) pm, β = 106.764(2)°, V = 1170.72(7) × 10⁶ pm³; Na₂[S₅O₁₆]: orthorhombic, Pbcn, Z = 4, a = 880.17(3) pm, b = 1039.88(4) pm, c = 1348.58(5) pm, V = 1234.32(8) × 10⁶ pm³; Ag₂[S₅O₁₆]: orthorhombic, Pbcn, Z = 4, a = 884.34(4) pm, b = 1043.19(5) pm, c = 1381.83(7) pm, V = 1274.8(1) × 10⁶ pm³; Cs₂[S₅O₁₆]: monoclinic, P2₁, Z = 4, a = 892.96(3) pm, b = 859.72(3) pm, c = 978.30(4) pm, β = 101.443(2)°, V = 736.11(5) × 10⁶ pm³}. All four compounds are colorless and extremely moisture-sensitive substances. They all contain the pentasulfate anion [S₅O₁₆]^2– that has, until now, only been reported once. This comparative study of polysulfate salts with the same polysulfate anion, but varying countercations, is a crucial step in comprehending this very basic and, nevertheless, poorly investigated class of materials. Raman spectroscopy and powder diffraction complete the structural investigations.