Synthesis, thermal, XRD and spectroscopic studies characterization of Tutton salt K2M (SO4)2·6H2O (M = Mg, Ni)

• Published in: Journal of molecular structure 2016-09, Vol.1120, p.234-238
• Main Authors: Marzougui, H., Attia-Essaies, S., Ben Hassen-Chehimi, D.
• Format: Article
• Language: English
• Subjects: FT-IR spectroscopy; Raman spectra; Tutton’s salt; XRD
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2016.05.040

Tutton’s salts K2M(SO4)2·6H2O (M = Mg, Ni) have been synthesized by the slow evaporation method at room temperature. A complete structural characterization has been carried out by means of powder X-ray diffraction (XRD). The results indicate that the structure of these salts is monoclinic system with the space group P21/a (Z = 2). IR and Raman spectra of KMS6 (M = Mg,Ni) have been recorded and analyzed. From the spectra, the vibrations due to SO42− ion, the complex [M(H2O)6]2+ and the water molecules have been identified. Thermogravimetry, differential thermal analysis and XRD at high-temperature investigations show that the dehydration of these salts occurs between 300 and 500 K. This indicates the removal of all water molecules around 426 K. [Display omitted] •Crystals of K2M (SO4)2·6H2O (with M = Mg, Ni) have been grown by slow evaporation.•The crystals were characterized with X-ray diffraction (monoclinic with space group P21/a)•Vibration frequencies of SO42− and H2O molecules confirmed by Raman and IR.