Aspects of gel growth of cadmium oxalate single crystals doped with monovalent (Li +, Na +, K* and NH~) and divalent (Ca 2+, Co 2+, Ni z+ and Zn 2÷) cation impurities are discussed. The growth experiments were carried out by single diffusion method. In this paper the effect of composition of the supernatant solution is considered. Rigorous characterization involves determination of composition of cations by employing atomic absorption spectrophotometer and of anions by titration method. The Pauling radius, hydration energy and distribution coefficient of the cations are tabulated and the results are described and discussed.
In the present paper, the Sr2+ doped Copper cadmium oxalate (CuCO) and Cobalt
cadmium oxalate (CoCO) crystals were grown by the single diffusion method in silica
hydrogel at room temperature. Optimum conditions of the as-grown crystals were established
by varying different growth parameters. Energy-dispersive X-ray analysis (EDX) confirmed
the presence of major elements such as Sr2+, Co2+, Cu2+, Cd2+ ions in the lattice of the grown
crystals. The percentage weight loss, molecular weight and thermal stability of the grown
crystals were studied using Thermogravimetric analysis (TGA). The Energy gap, refractive
index, reflectance and electrical polarizability of the crystals were calculated by using UVVisible
spectroscopy. Direct and Indirect band gaps are calculated using Tauc’s plot
Mg2+ doped Copper Cadmium oxalate (MCuCO) single crystals were grown by a single diffusion method in silica hydrogel at room temperature. Powder X-ray diffraction (XRD) studies show the triclinic nature of the crystals. The dielectric constant, ac resistivity and ac conductivity have been measured as a function of frequency. The dielectric constant of MCuCO crystal decreases as the frequency of applied field increases; at the end it gives the diminishing value of dielectric constant. AC conductivity increases with the increase of frequency. Absorbance, transmittance, reflectance, refractive index, and energy gap of MCuCO crystal were determined by UV-Visible spectroscopy. A high bandgap corresponds to the dielectric behavior of the crystal.
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