Acta Cryst. (2006). E62, i216-i218  [ doi:10.1107/S160053680603916X ]

Redetermination of the high-pressure modification of AlOOH from single-crystal synchrotron data

K. Komatsu, T. Kuribayashi, A. Sano, E. Ohtani and Y. Kudoh

Abstract: The single-crystal synchrotron study of the high-pressure modification of aluminium oxide hydroxide, -AlOOH, confirms the previous structure determination in the space group P2₁nm, which was based on X-ray powder data [Suzuki, Ohtani & Kamada (2000). Phys. Chem. Miner. 27, 689-693]. The present study includes the determination of the H-atom parameters, which revealed a strong asymmetric hydrogen bond with an OO distance of 2.5479 (12) Å. The -AlOOH structure is isotypic with that of -CrOOH and may be considered as a distorted rutile type with all atoms located on mirror planes.

Online 4 October 2006

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