In this present work, CTH and BCTH crystals have been prepared by gel technique by using single diffusionudmethod at room temperature. The as grown crystals were characterized by using XRD, FT-IR, UV,udTG / DTA and Micro hardness studies. X-ray powder diffraction results analyzed by using suitable softwareudsuggest that a CTH and BCTH crystals belong to cubic crystal system. The unit cell volume is observedudto increase with increase in the concentration of barium in cobalt tartrate due to the lattice distortion.udThe band gap and optical properties have analyzed by UV-Visible spectrum. The functional groupsudand compound formation of the crystals have been studied by FT-IR spectrum. The mechanical propertiesudof the grown crystals were tested by using Vicker’s microhardness studies. The work hardening coefficientud(n) was determined to be 3.7 for CTH, 5.3 for BCTH (1 : 1) and 6.4 for BCTH (2 : 1) and the stiffness constantsudfor different loads were calculated and reported. Thermal analysis suggests that pure cobalt tartrateudstarts decomposing at 73.2 C whereas the barium mixed cobalt tartrate brings about better thermal stabilityudwhich increases with an increase in barium concentration.
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