[3] [3] Qiu Zhaoming, Rang Mei, Huang Junjie. Hyperfine Interactions. 1992, 70: 1013.

[5] [5] Arijit Sengupta, Kadam R M, Rajeswari B, et al. Applied Clay Science, 2010, 50: 305.

[6] [6] Anbalagan G, Sakthi-Murugesan K, Balakrishnan M, et al. Applied Clay Science, 2008, 42: 175.

[7] [7] Gonzalez G, Ortega F, Nava N E, et al. Hyperfine Interactions. 2003, 148/149: 61.

[8] [8] René Rojas Rocca1, Sonia Hatsue Tatumi, Shigueo Watanabe. Journal of Physics: Conference Series, 2010, 249: 1742.

[10] [10] Castner T, Newell G S, Holton W C, et al. Journal of Chemical Physics, 1960, 32: 668.

[11] [11] Weil J A. Applied Magnetic Resonance, 1993, 6: 1.

[12] [12] Nassrallah-Aboukais N, Boughriet A, Fischer J C, et al. J. Chem. Soc. Faraday Trans., 1996, 92: 3211.

[13] [13] Gunasekaran S, Anbalagan G. Spectrochimica Acta Part A, 2008, 69: 383.

[14] [14] Michail N T, Monika K M. Physics and Chemistry of Minerals, 2006, 33: 511.

[15] [15] Hunt G. Geophysics, 1977, 42: 501.

[16] [16] Gopal N O, Narasimhulu K V, Rao J L. Spectrochimica Acta Part A, 2004, 60: 2441.

[18] [18] Tanabe Y, Sugano S. Journal of the Physical Society of Japan, 1954, 9: 753.

[19] [19] Sherman D M, Waite T D. American Mineralogist, 1985, 70: 1262.