“…Also, information of the structural changes of the dissolved species has been observed in several systems consisting of a-Al 2 O 3 and CoCl 2 11 or NiCl 2 . 12 The systems containing transition metal complexes show changes in the visible (VIS) absorption spectra. Recently, we measured the conductivity and Raman spectra of the molten nitrates coexisting with the porous inorganic powder.…”