We also applied such heated method to the Zn 2+ (Cd 2+ )//F -//Na + //SO4 2-solutions prepared by path 2. Analogous close behavior of spectral feature between the solutions prepared by paths 1 and 2 is also observed (Fig. ). These results suggest that the temperature could promote the transformation from the microstructure of solution prepared by path 2 to that of solution prepared by path 1.