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It must be noted that the main objective of this study was to obtain single   crystals of calcium fluoride - CaF2, and after that the crystals were   characterized with various spectroscopic methods. The crystals were grown   using the Bridgman technique. By optimizing growth conditions, <111> oriented   CaF2 crystals up to 20 mm in diameter were grown. Number of dislocations in   CaF2 crystals was 5×104 - 2×105 per cm2. Selected CaF2 single crystal is cut   into several tiles with the diamond saw. The plates were polished, first with   the silicon carbide, then the paraffin oil, and finally with a diamond paste.   The obtained crystal wаs studied by Raman and infrared -IR spectroscopy. The   crystal structure is confirmed by X-ray diffraction (XRD). One Raman and two   IR optical modes predicted by group theory are observed. A low   photoluminescence testifies that the concentration of oxygen defects within   the host CaF2 is small. All performed investigations show that the obtained   CaF2 single crystal has good optical quality, which was the goal of this   work. [Projekat Ministarstva nauke Republike Srbije, br. III 45003 i br.   TR34011

The Bridgman method growth and spectroscopic characterization of calcium fluoride single crystals