Acta Cryst. (2006). E62, i109-i111  [ doi:10.1107/S1600536806011044 ]

Inversion parameter of the CoGa₂O₄ spinel determined from single-crystal X-ray data

A. Nakatsuka, Y. Ikeda, N. Nakayama and T. Mizota

Abstract: Single crystals of cobalt digallium tetraoxide, CoGa₂O₄, have been grown by cooling slowly a 1:1 mixture of CoO and Ga₂O₃ from 1473 K to room temperature under the presence of a PbF₂ flux. The compound crystallizes with the cubic spinel structure (space group Fdm). The occupancy refinement based on single-crystal X-ray diffraction data shows CoGa₂O₄ to be a largely normal spinel with an inversion parameter of 0.575 (4), resulting in a structural formula of ^IV(Co_0.425Ga_0.575)^VI[Co_0.575Ga_1.425]O₄, where ^IV() and ^VI[] represent the tetrahedral and the octahedral sites, respectively.

Online 5 April 2006

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