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The incorporation of P in GST forms the secondary GeP rich phase. The presence of secondary phase and point defects (Sb and P) enhanced the additional scattering effects in the system.

Pure and Molybdenum (Mo) doped Potassium Titanyl Phosphate (KTP) inorganic crystals were grown by high temperature solution growth (HTSG) from poly phosphate (K 6 P 4 O 13 ) flux using different KTP/Flux ratios. The pure and doped KTP crystals of size 20x13x5 mm 3 and 7x5x2.5 mm 3 respectively were grown successfully by spontaneous nucleation. The grown crystals were characterized by XRD, UV, FTIR and Hardness studies. Micro hardness studies show that the pure crystals are harder than the Mo doped crystals.

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