Crystal structure of Lanthanoide oxides Type C. The unit cell contains 16 formulas <span class="chemf nowrap">R<span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1em;font-size:80%;text-align:left"><br>2</span>W<span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1em;font-size:80%;text-align:left"><br>3</span></span> (R=red, W=white). Each red ion is surrounded by six white ions, and each white by four red.
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Eigenes Werk (own work), data source: M. Marezio: <i>Refinement of the crystal structure of In2O3 at two wavelengths</i>. In: Acta Cryst. (1966). 20, S. 723-728.