[2] Harbottle G, Weigand P C. Scientific American, 1992, 266(2): 78.
[9] Cid-Dresdner H, Villarroel H S. American Mineralogist, 1972, 57: 1681.
[10] Reddy B J, Frost R L, Weier M L, et al. Journal of Near Infrared Spectroscopy, 2006, 14: 241.
[11] Sklavounos S, Ericsson T, Fillippidis A, et al. Neues Jahrbuch für Mineralogie Monatshefte, 1992, 241: 469.
[12] Yassir A A, Sharon K H, Mostafa F, et al. American Mineralogist, 2011, 96(10): 1433.
[13] Foord E E, Taggart J E. Mineralogical Magazine, 1998, 62(1): 93.
[14] Frost R L, Reddy B J, Martens W N, et al. Journal of Molecular Structure, 2006, 788(1): 224.