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Bismuth silicate (Bi4Si3O12, BSO) is known as an excellent scintillator for various applications in high energy physics, nuclear physics, medical imaging, geological prospecting and other industries due to its advantages of much faster decay time, higher radiation hardness and lower cost [1-4].BSO crystal has been grown successfully by the modified Bridgman method and the raw materials of polycrystalline BSO powders were usually synthesized by solid state reaction [5-7].