Structure, growth and characterisation of potassium magnesium zinc sulphate hexahydrate crystal

Abstract

Mixed crystal of K2MgO.28ZnO.72 (SO4)2⋅6H2O (KMZS) was developed from Tutton’s salt in equimolar concentration at aqueous medium, K2Mg (SO4)2⋅ 6H2O (MPSH) and ZnSO4 using slow evaporation technique. XRD is used to determine single crystal structure. To recognize the material, the PXRD profiles and FT-IR are used. The surface morphological changes are detected by SEM. Energy dispersive spectra (EDS) reveals the being of metals in the crystal. UV–vis spectrum clearly says that the grown crystal shows good optical transparency and its band energy gap was determined. The thermogravimetric and thermal analysis were used to examine the thermal nature of grown crystal. The perfection in crystal structure was determined by XRD curves. XRD analysis confirms the crystallinity and the complex crystal is monoclinic with centro-symmetric freedom assembly P21/c. crystal structure is balanced by Hydrogen bonds of OH⋅⋅⋅O and OH⋅⋅⋅O. On visible region, optical absorption shows fine transmission and wavelength cutoff is approximately 240 nm with a band energy gap of 4.8 eV.