Preparation of Fine Sericite,a Kind of Clay, by Chemically Assisted Dry Comminution -Effect of Nitrate on Grindability F. Ikazaki, K. Uchida, K. Kamiya, A. Kawai, S. Yoda, and A. Gotoh [J. Soc. Powder Technol., Japan, Vol.31, pp.647-651, 1994]