Following the discovery of a new monoclinic phase in this material, an analysis was made here of twinning between spontaneous strain at the various phase boundaries. It was shown that both non-generic non-conventional twins, and finely-twinned laminates, were possible.

On Twinning and Domain Switching in Ferroelectric Pb(Zr1-xTix)O3 - I: Twins and Domain Walls. F.Daví, R.Rizzoni: Journal of the Mechanics and Physics of Solids, 2004, 52[1], 113-44