2023年1月5日 · The Lindemann index at the melting point (L c – 0.16) is in the range of typical critical Lindemann indices (0.1–0.2).[54] The comparison of L all , L Na+, and L Al3+ ( Fig. 6 B) indicates that, at temperatures above the melting point, structural disorder first appears in the Na + ions, OH – ions, OH ligands, and H 2 O and then later appears in the