Reciprocal lattice ●Defined by its primitive vectors(原胞基矢)(a1,a2,a3); Generating three reciprocal primitive vectors(a*,b*,c*) a*=a2Xa3la1●(a2Xag) b*=a3xa/a2(a3xa) c*=a xa2/a3(a xa2) https://en.wikipedia.org/wiki/Reciprocal latticeReciprocal lattice ⚫ Defined by its primitive vectors（原胞基矢）(a1 ,a2 ,a3 ); ⚫ Generating three reciprocal primitive vectors(a*,b*,c*) https://en.wikipedia.org/wiki/Reciprocal_lattice a*=a2xa3 /a1 •(a2xa3 ) b*=a3xa1 /a2 •(a3xa1 ) c*=a1xa2 /a3 •(a1xa2 )