A modulated structure of ln2O3(ZnO)m as revealed by high-resolution electron microscopy

1 January 1997

journal article
Published by Oxford University Press (OUP) in Journal of Electron Microscopy

Vol. 46 (2) , 119-127
https://doi.org/10.1093/oxfordjournals.jmicro.a023499

Abstract

A modulated structure appearing in the homologous series of compounds In₂O₃(ZnO)_m (m = 3, 6, 10, 13, 15, 17 and 20) has been studied by high-resolution transmission electron microscopy. The basic structure of these compounds consists of InO₂^1- layers interleaved with InZn_mO_m+1¹⁺ layers along the c axis. The space groups are either hexagonalP6₃/mmc for m = even numbers or rhombohedral R∥3m for odd numbers. The modulated structure showing a-zig-zag shape has been found for m >6. It is shown that the non-integral periodicities for the modulation waves increase with higher values ofm numbers. The modulated structure model where trivalent In atoms are ordered within In/Zn-O layers is proposed.

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