Crystal chemical aspects of the bismuth-containing layered compounds of the Am−1Bi2BmO3m+3type

Some aspects of the crystal chemistry of the bismuth-containing layered ferroelectrics of the Am−1Bi2BmO3m+3 type are discussed: conditions for the existence of the compounds, behavior of compounds of Am−1Bi2BmO3m+3 + nA′B′O3 series, two ways of the solid solution formation, peculiarities of the ferroelectric state, influence of different factors on the Curie temperatures, presence of low-temperature phase transitions, and some other problems.