Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 28, 2010
Previous Article Next Article

Cation ordering in perovskites

Author affiliations

Abstract

Although both A- and B-site cations have the same simple cubic topology in the perovskite structure they typically adopt different patterns of chemical order. As a general rule B-site cations order more readily than A-site cations. When cation ordering does occur, rock salt ordering of B/B′ cations is favored in A2BBX6 perovskites, whereas layered ordering of A/A′ cations is favored in AAB2X6 and AABBX6 perovskites. The unexpected tendency for A-site cations to order into layers stems from the bond strains that would result at the anion site if A and A′ cations of different size were to order with a rock salt arrangement. The bonding instabilities that are created by layered ordering are generally offset either by anion vacancies or second order Jahn–Teller distortions of a B-site cation. Novel types of A-site cation ordering can be stabilized by a+a+a+ or a+a+c tilting of the octahedra.

Graphical abstract: Cation ordering in perovskites

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 21 Dec 2009, accepted on 04 Mar 2010 and first published on 15 Apr 2010


Article type: Feature Article
DOI: 10.1039/B926757C
Citation: J. Mater. Chem., 2010,20, 5785-5796
  •   Request permissions

    Cation ordering in perovskites

    G. King and P. M. Woodward, J. Mater. Chem., 2010, 20, 5785
    DOI: 10.1039/B926757C

Search articles by author