抄録
The phase diagram of the whole range of the PbZrO3–PbTiO3 system was determined by the dielectric and dilatometric measurements. According to the reason shown in part I, this phase diagram can be divided into three regiors; paraelectric, ferroelectric and antiferroelectric phases. The crystal structure of this system was determined by the Debye photographs. In the antiferroelectric region solid solutions have a tetragonal modification of perovskite structure with c⁄a<1 and have some superstructure which seems to have intimate relation to the antiferroelectricity. In the ferroelectric region, except a region near antiferroelectric phase in which pseudocubic structure is observed, they have ordinary tetragonal structure of c⁄a>1 without any superstructure.
