1、简单立方堆积立方体的棱长为2r,球的半径为r2r过程:1个晶胞中平均含有1个原子V球=334r%100晶胞球VVV晶胞=(2r)3=8r3空间利用率=%10083433rr=52%2、体心立方堆积ab222aab22223)4(abarra34%10034233ar%1003434233)(rr%68%10083空间利用率=a3、六方最密堆积s2r23232rrrsrh3623342rV球h2r2r32283622322srrrhV晶胞%100晶胞球VV%1002834233rr=74%空间利用率=s4、面心立方最密堆积4rara223344rV球333216)22(arrV晶胞%100晶胞球VV%10021634433rr=74%空间利用率=