Solid solution Li2MoO4 - Li2WO4 crystal growth and characterization

Solid solution Li2Mo1−XWXO4 crystals were grown from two different melts (X=0.85 and 0.95) by Czochralski technique. The crystals were colorless and transparent within 300-1100 nm wavelength range. They had dimensions of 25 mm diameter and 100 mm length. The crystal grown from the X=0.85 melt had an inhomogeneous composition which varied from 0.65 to 0.88. The crystal grown from the X=0.95 melt had a uniform distribution of X, corresponding to the average Li2Mo0.08W0.92O4 composition. Both crystals belong to a phenacite-type structure and they were characterized by X-ray diffraction, Raman and IR-spectroscopy.