倒易点阵(reciprocal lattice) First introduced by Peter Paul Ewald in 1921 b×c cXa axb a*: ,b*= C* V V V b*×c* c*xa* a*×b* a .b= c= V* V* V* a*垂直于bc平面； b*垂直于ac平面； c*垂直于ab平面； b* 11
倒易点阵(reciprocal lattice) • First introduced by Peter Paul Ewald in 1921 11 a*垂直于bc平面； b*垂直于ac平面； c*垂直于ab平面；
倒易点阵(reciprocal lattice) First introduced by Peter Paul Ewald in 1921 a*.b=a*.c=b*.a=b*.c=c*.a=c*.b=0 a*·a=b*.b=c*.c=1 V。V*三1 6* 12
倒易点阵(reciprocal lattice) • First introduced by Peter Paul Ewald in 1921 12 V● V*≡1