X-ray emission from LiTaO3 induced by thermal changes and structure analysis

X-ray emission from LiTaO3 induced by the thermal changes from about 300-480 K has been investigated in a vacuum system. The single-crystal X-ray structure analysis of LiTaO3 was carried out at 269, 286, 303, 319, 337, 358, 381, 413, and 436 K, respectively, far below the phase transition (∼930 K). The relationship between the observed X-ray emission and the pyroelectric coefficient of LiTaO3 is discussed.