Flux growth of KGaP2O7 single crystals

Abstract Transparent potassium gallium pyrophosphate single crystals, KGaP 2 O 7 , have been grown by a spontaneous nucleation method using K 4 P 2 O 7 –4KPO 3 as flux. The as-grown crystals were characterized by X-ray powder diffraction (XRPD), differential thermal analysis (DTA) and thermo-gravimetric analysis (TGA) techniques. The results show that the as-grown crystals were well crystallized and indexed in a monoclinic crystal system with space group P2 1 /c. The crystal is stable in the measurement temperature range of 25–939.9 °C, and it melts congruently at 947 °C. The frequencies of the vibrational modes of the crystal were also obtained from measurements of the infrared spectrum.