Abstract
Nickel sulphate hexahydrate (NSH) and potassium magnesium nickel sulphate hexahydrate (KMNSH) single crystals were grown by slow evaporation method. The grown NSH crystal was found to crystallize in tetragonal system with space group P41 21 2 and KMNSH in monoclinic system with space group P121/c. The optical band gap energies of the grown crystals using UV-Vis spectral results for the doped and undoped NSH crystals were calculated. The presence of various functional groups in the crystal was identified by FTIR analysis. The thermal behaviour of the grown crystal has been studied by TGA/DTA analysis.
Highlights
Ultraviolet (UV) light filters are used in missile approach warning systems which locate and track UV energy emitting sources and are used as sensors for helicopters or transport aircraft
The grown Nickel sulphate hexahydrate (NSH) and KMNSH crystals were crushed to a uniform fine powder and subjected to powder X-ray diffractometer to identify the reflecting planes
It is observed that structure of KMNSH is monoclinic with space group P121/c and NSH is tetragonal with space group P41 21 2
Summary
Ultraviolet (UV) light filters are used in missile approach warning systems which locate and track UV energy emitting sources and are used as sensors for helicopters or transport aircraft. The potassium nickel sulphate hexahydrate (KNSH) crystals which have higher thermal stability as 97∘C are used in missile approach warning systems and as sensors in spaceships [1, 2]. Several other crystals such as cesium nickel sulphate hexahydrate (CNSH) [3], iron nickel sulphate twelvehydrate (FNSH) [4], rubidium nickel sulphate hexahydrate (RNSH) [5], and ammonium cobalt nickel sulphate hexahydrate (ACNSH) [6] are reported as UV filter materials. In the search of newer crystalline materials with better filter transmission property and higher thermal stability, the growth of potassium magnesium nickel sulphate crystal has been carried out in this research work
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