Compositional dependence of lattice constants in solution grown crystals of mixed ammonium-potassium sulphate by X-ray diffraction

摘要

X-ray diffraction studies have been carried out on solution grown mixed crystals of ammonium-potassium sulphate (ASPS) over the entire range of composition. Lattice parameters a, b and c are experimentally determined using Computer program POWD and have been found to obey Vegard's law of linear dependence with a constant deviation. Results are analysed in the light of packing consideration of the individual atoms.