[1] Zhang Shuyu, Wu Xing, Song Youting, et al. Growth of birefringent Ca3 (BO3 )2 crystals by the Czochralski method ［J］. Journal of Crystal Growth, 2003, 252: 246-250.

[2] Schuckmann W. Zur Kristallstruktur des Calcium-Borates Ca3 (BO3 )2 ［J］. Neues Jahr. Mineral. Monatsh., 1969, 3: 142-143.

[3] Vegas A, Cano F H, Garcia-Blanco S. The crystal structure of calcium orthoborate: a redetermination ［J］. Acta Cryst., 1975, B31: 1416-1419.

[4] Majling J, Figusch V, Hanic F, et al. Crystal data and thermal expansion of tricalciumborte ［J］. Mat. Res. Bull., 1974, 9: 1379-1382.

[5] Lu Xiuai, You Zhenyu, Li Jianfu, et al. Growth and properties of pure and rare earth-doped Ca3 (BO3 )2 single crystal ［J］. Journal of Crystal Growth, 2005, 281: 416-425.

[6] Lu Xiuai, You Zhenyu, Li Jianfu, et al. Optical transition properties of the Nd3+ions in Ca3 (BO3 )2 crystal ［J］. Phys. Stat. Sol. (a), 2006, 203: 551-557.

[9] Bethell D E, Sheppard N. The infrared spectrum and structure of boric acid ［J］. Transactions of the Faraday Society, 1955, 51: 9-15.

[10] Steele W C, Decius J C. Infrared absorption of lanthanum, scandium and indium borate and the force constants of borate ion ［J］. Journal of Chemical Physics, 1956, 25: 1184-1188.