MECHANISM OF STRONTIUM SEGREGATION FROM SILICOANTIMONATES AT ROOM TEMPERATURE
The process of aging of strontium silicoantimonates under normal conditions has been studied. It is shown that the process begins with the segregation of strontium in the reaction with carbon dioxide in the presence of water vapor. The high rate of this reaction is explained by considering the structural motifs of the original perovskite and strontium carbonate lattices. Close values of the lattice parameters of the two structures, and similar arrangements of strontium atoms within their lattices greatly facilitate the nucleation of carbonate phase on the perovskite surface.