[2] Teng B, Wang J Y, Wang Z P, et al. Science in China(Series E), 2002, 45(1): 19.

[3] Hellwig H, Liebertz J, Bohaty L. Journal of Applied Physics, 2000, 88(1): 240.

[4] Teng B, Wang J Y, Wang Z P, et al. Journal of Crystal Growth, 2001, 224: 280.

[5] Teng B, Wang J Y, Wang Z P, et al. Journal of Crystal Growth, 2001, 233: 282.

[6] Becker P, Liebertz J, Bohaty L. Journal of Crystal Growth, 1999, 203: 149.

[7] Teng B, Wang J Y, Wang Z P, et al. Chinese Science Bulletin, 2001, 46(21): 1783.

[8] Zavartsev F Y, Koutovoi S A, Voronov V V, et al. Journal of Crystal Growth, 2005, 275: e637.

[9] Wan S M, Teng B, Zhang X, et al. Cryst Eng. Comm., 2010, 12: 211.

[10] Wan S M, Zhang X, Zhao S J, et al. Crystal Growth & Design, 2008, 8(2): 412.

[11] Zhang X, Yin S T, Wan S M, et al. Chin. Phys. Lett., 2007, 24(7): 1898.

[12] Hou M, You J L, Simon P, et al. Cryst Eng. Comm., 2011, 13: 3030.

[13] Simon P, Moulin B, Buixaderas E, et al. Journal of Raman Spectroscopy, 2003, 34: 497.

[14] Segall M D, Lindan P J D, Probert M J, et al. Journal of Physics: Condensed Matter, 2002, 14: 2717.

[15] Delley B. J. Chem. Phys., 1990, 92(1): 508.

[16] Delley B. Journal of Chemical Physics, 2000, 113(18): 7756.

[17] Frohlich V R, Bohaty L, Liebertz J. Acta Cryst., 1984, C40: 343.

[18] Egorysheva A V, Skorikov V M. Inorganic Materials, 2009, 45(13): 1461.

[19] Egorysheva A V, Burkov V I, Kargin Y F, et al. Crystallography Reports, 2005, 50(1): 127.

[20] Hu X B, Wang J Y, Teng B, et al. Journal of Applied Physics, 2005, 97(3): 033501.

[21] You J L, Jiang G C, Hou H Y, et al. Journal of Raman Spectroscopy, 2005, 36: 237.

[22] Kasprowicz D, Runka T, Szybowicz M, et al. Cryst. Res. Technol., 2005, 40(4/5): 459.

[23] Kaminskii A A, Becker P, Bohaty L, et al. Optics Communications, 2002, 206: 179.

[24] Rulmont A, Almou M. Spectrochimica Acta, 1989, 45A(5): 603.

[27] Scott A P, Radom L. J. Phys. Chem., 1996, 100(41): 16502.