Nm. Olekhnovich et al., PBGE3 STRUCTURE PHASE-TRANSITIONS UNDER H IGH-PRESSURES AND TEMPERATURES AND FERROELECTRIC PEROVSKITES OF THE PBZRO3-PBGEO3 SYSTEM, Doklady Akademii nauk BSSR, 38(2), 1994, pp. 40-44
The monoclinic phase PbGeO3 synthesized under ambient pressure is foun
d to transform to garnet ilmenite and perovskite phases with increasin
g pressure. Lattice parameters are for the tetragonal garnet phase a=1
.383, c=1.312 nm, for the hexagonal ilmenite phase a=0.5504, c=1.420 n
m and for the cubic perovskite phase a=0.3968 nm. Structural and ferro
electric characteristics are given for perovskites of the PbZrxGe1-xO3
solid solution system synthesized under high pressure and temperature
s.