General approach to structural categorization

8 ‚ Other Homological Series

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1 ‚ Perovskites
2 ‚ Cation-deficient structures
3 ‚ Anion-deficient structures
4 ‚ Polytypes AmBnX3m
5 ‚ Layered structures
6 ‚ Ruddlesden-Popper-phases
7 ‚ Aurivillius phases
8 ‚ Other Homological Series
8.1 ‚ "1201"-Structure
8.2 ‚ "12m2"-Series
8.3 ‚ "1223"-Structure
8.4 ‚ Higher Homologues ("12(n-1)n")
8.6 ‚ (A'B'O3)mLn3Cu2O7

Other homological series do in the outmost cases have strong relations to structures, that have allready been classified in other windows.

The general formula for these phases is AnBnX3n+1

Apart from the "12m2"-series, two other series known from the HTSCs appear in section 8.2:

  • "m23"-series in 8.2.4
  • "2m2"-series in 8.2.5

Adapted from "Hierarchies of perovskite-like crystals" by K. S. Aleksandrow and V. V. Beznosikov in Physics of the Solid State 39, 695-715 (1997).


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last changed: Jul 16, 1998. © 1997‚1998 Carsten Schinzer.