Self-Dual Plane Nets in Crystal Chemistry

A self-dual net is one that is identical to its dual. It is shown that some of the more commonly occurring binary and ternary intermetallic crystal structure types can be very simply described as a stacking of self-dual nets. Common structure types discussed include those of CrB , Cu2Sb (= PbClF ), BaAl4 (=ThCr2Si2) and CoSi2 (= SrMgSi ).