Affiliation: | aOsaka National Research Institute, 1-8-31 Midorigaoka, Ikeda, Osaka, 563, Japan;bOsaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka, 560, Japan;cLaboratoire de Chimie des Solides, Université Paris XI Orsay, Batiment 414, 91405, Orsay Cedex, France;dKobe University, Rokkoudai-cho, Nada, Kobe, Hyogo, 657, Japan |