On the dynamics of low-temperature domains above TC in lead phosphate

Results derived from the scattering of Mössbauer γ-rays from lead phosphate, Pb3(PO4)2, at temperatures above the transition temperature (180°C) are consistent with the idea that the crystal contains regions which have the symmetry of the low-temperature, ferroelastic phase. These microdomains are either very long-lived, a result which is inconsistent with findings from neutron scattering experiments reported in the literature, or have lifetimes which are considerably shorter than 10−7 seconds.