Abstract
Abstract A number of NH4HSeO4-NH4HSO4 mixed crystals have been grown. The system exhibits limited solubility in the solid state. The limiting solid solutions correspond to x = 0.32 and 0.67 (x - molar fraction of NH4HSO4). Based on X-ray diffraction, Differential Thermal Analysis and dielectric studies, the phase diagram has been drawn with x as the parameter. It has been found that crystals with 0.9 ≥ x ≥ 0.67 do not show a ferroelectric phase transition and resemble dipole glasses in their properties.
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