12x6 /34 2 12 ar,√2 互 2126 6 /rx=-1 2 =0.732 =0414 =0.225 半径比 配位数 AB型结构 r/r 12 1>r,/r.>0.732 CSCI 0.732>r/r>0.414 864 aCl 0.414>r/r>0.225 ZnS半径比 配位数 AB型结构 r+/r- = 1 12 1 > r+/r- > 0.732 8 CsCl 0.732 > r+/r- > 0.414 6 NaCl 0.414 > r+/r- > 0.225 4 ZnS