Raman light scattering in two kinds of PbZrO3 single crystals have bee
n investigated. Special attention was paid to the paraelectric phase i
n which the first order defect-induced Raman spectra are present up to
the very high temperature. In sample with intermediate phase of ferro
electric behaviour, an additional Raman line at similar to 144 cm(-1)
was found to appear in temperature range of about 50 K above T-c and c
onnected with existence of static clusters of the polar character.