we known refractive index calculation in UV -Vis NIR. for that characterization need the 30mm size crystal. refractive index studies also we need 30 mm . but i am working in semi organic. my crystal size max. 10mm only. how to do that ??
Mr. Vadivel,
Despite the fact that you have operated with semi-organics, you should concentrate efforts in the crystal growth in order to obtain suitable single crystal for refractive index measurements.
The conventional crystal growth techniques are solution growth techiques. They are using in 75 % of crystal systems with an industrial scale application. In this context I have questions:
(i) what is the absolute solubility of your compound with a set solvents and solvent mixtures, which you have tried as crystallization medium?
(ii) What is the temperature dependence of the solubility of your semi-organics?
When you have crystallosolvates they have lower melting point. Given that:
(iii) is your system crystallosolvate? If yes, then have you tried to recrystallized it from another solvent? If yes which one?)
(iv) Have you tried salt melts techniques; or the liquids in a supercritical states?
If you have tried those methods, and you cannot obtain suitable crystalline object, then there are set other techniques, but they depend on the melting point of your compound.
(v) Can you upload TGV with the melting point data? And have you observed a decomposition stateg?
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