³⁵Cl Quadrupole Relaxation Study on Cs₂[Au(Ⅰ)Cl₂][Au(Ⅲ)Cl₄] and Cs₂[Ag(Ⅰ)Cl₂][Au(Ⅲ)Cl₄]. A. Ishikawa, M. Kurasawa, A. Sasane, R. Ikeda and N. Kojima