C. Sun, . Do, and . Xue, Opt. Mater, vol.36, 1966.

F. M. Souza, Mat. Res, vol.20, p.532, 2017.

M. Rathnakumari, J. R. Gandhi, P. Murali-manohar, and P. Sureshkumar, Optik, vol.124, p.5702, 2013.

I. Hwan-oh, K. Lee, M. Meven, G. Heger, and C. E. Lee, J. Phys. Soc. Jpn, vol.79, p.74606, 2010.

T. Rhimi, N. Nguili, S. Guermazi, A. Bulou, and M. Toumi, Vib. Spectrosc, vol.86, p.50, 2016.

K. Lee, I. Oh, J. J. Kweon, C. E. Lee, and S. H. Ahn, Mater. Chem. Phys, vol.136, p.802, 2012.

V. V. Adrabinska and W. Wojciechowski, J. Mol. Struct, vol.156, p.15, 1987.

C. M. Preston and W. A. Adams, J. Phys. Chem, vol.83, p.814, 1979.

P. Tarte, Spectrochim. Acta, vol.20, p.238, 1964.

K. Lee, J. Ko, J. Moon, S. Lee, and M. Jeon, Solid State Commun, vol.145, p.487, 2008.

R. Dekhili, T. H. Kauffmann, H. Aroui, and M. D. Fontana, Solid State Commun, vol.279, p.22, 2018.

K. Nakamato, Infrared and Raman Spectra of Inorganic and Coordination Compounds, p.194, 2008.

M. D. Fontana, K. Ben-mabrouk, and T. H. Kauffmann, Spectrosc. Prop. Inorg. Organomet. Compd, RSC books, vol.44, pp.40-67, 2013.

Y. Hase and I. V. Yoshida, Spectrochim. Acta, Part A, vol.35, p.379, 1979.

L. B. Taher, L. Smiri, Y. Laligant, and L. Maisonneuve, J. Solid State Chem, vol.152, p.428, 2000.

A. Slodczyk, . Ph, S. Colomban, O. Willemin, B. Lacroix et al., J. Raman Spectrosc, vol.40, p.513, 2009.

H. Ettoumi, F. Ben-brahim, M. Toumi, and T. Mhiri, Ionics, vol.19, 0193.

. Ph and . Colomban, Annales de Chimie Science des Materiaux, vol.24, issue.1, pp.1-18, 1999.

J. J. Kweon, K. Lee, C. Lee, K. Lee, and Y. J. Jo, Appl. Phys. Lett, vol.101, p.12905, 2012.

T. Rhimi, M. Toumi, K. Khirouni, and S. Guermazi, J. Alloys Compd, vol.714, p.546, 2017.

V. Koleva, V. Stefov, M. Najdoski, and A. Cahil, Vib. Spectrosc, vol.62, p.229, 2012.

A. Novak, Structure and Bonding, vol.18, pp.177-216, 1974.