Complex structure and Mössbauer effect observed in the course of phase transitions in PbZrSnO single crystal.

The Mössbauer effect was used to study the structural transitions in a PbZrSnO single crystal. Two kinds of quadrupole splittings were registered and connected with two different environments of the Sn ion occupying the center of SnO octahedra. What is responsible for the existence of these two environments is the disorder in tilts of oxygen octahedra and antiparallel shifts of pairs of lead ions.