1. Physical Chemistry, Material Science, Graduate School of Science and Technology, Chiba University, Phase Science, Diversity and Fractal Science, Graduate School of Science and Technology, Chiba University, Department of Chemistry, Faculty of Science, Chiba University 1-33 Yayoi, Inage, Chiba 263, Japan, and Research and Development Center, The Kansai Coke and Chemicals Co. Ltd., 1-1 Ohama, Amagasaki, Hyogo 660, Japan