2)基本公式 o=ma+nb+ pc a,b,C为晶体的基矢,m,n;p为整数,N=M·N2N3 E(=∑E03=∑e03=E∑∑-∑ epc. o Q=0 m=0 inab.S e (3-2) i6. S2)基本公式 为晶体的基矢,m,n,p为整数, Q r ma nb pc = + + N N N N = 1 2 3 1 1 0 0 ( ) Q Q N N ir S ir S c Q e e Q Q E S f E e fE e − − = = = = 1 2 3 1 1 1 0 0 0 N N N ima S inb S ipc S e m n p fE e e e − − − = = = = 1 2 3 1 1 1 1 1 1 iN a S iN b S iN c S e ia S ib S ic S e e e fE e e e − − − = − − − (3-2) abc ,