Polysomatic series in the structures of complex cuprates

The modular approach was applied to analyse the structure of complex cuprates. The modular series of various types were distinguished in the family of layered cuprates making use of the classification scheme in a fragment approximation developed earlier. The poly­somatic series were revealed in the groups of cuprates which were expected to possess the properties of both salt and oxide. The structure of the ladder-type cuprates was analysed in more detail. The present study has shown that the polysomatic model can be efficiently applied to the structural analysis of complex cuprates.