Crystallization in the Three-Component Systems Rb<sub>2</sub>SO<sub>4-</sub>MSO<sub>4-</sub>H<sub>2</sub>O (M = Mg, Co, Ni, Cu, Zn) at 298 K

• 作者: Donka Stoilova Veronika Karadjova
• 来源期刊: 结晶过程及技术期刊(英文)
• 学科: 化学
• 关键词: Rb2Me(SO4)2·6H2O (Me = Mg Co NI CU Zn) Solubility Diagrams X-Ray Powder Diffraction INFRARED Spectra Matrix INFRARED Spectroscopy
• 年，卷（期）: 2013,（4）
• 页码范围: 136-147
• 页数: 12页
• 分类号: O6

摘要

The crystallization in the three-component systems Rb2SO4-MSO4-H2O (M = Mg, Co, Ni, Cu, Zn) is studied by the method of isothermal decrease of supersaturation. It has been established that isostructural double compounds, Rb2M(SO4)2·6H2O (M = Mg, Co, Ni, Cu, Zn), , crystallize from the ternary solutions within wide concentration ranges. The infrared spectra are discussed with respect to the normal vibrations of the sulfate ions and water molecules. The unit-cell group theoretical treatment of the double salts is presented. The extent of energetic distortions of guest ions (about 2 mol%) matrix-isolated in the respective selenates, (M' = K, Rb,;M" = Mg, Co, Ni, Cu, Zn), is commented.