Bayerite, Al(OH)3, from Raoul Island, Kermadec Group, South Pacific
- 1 September 1989
- journal article
- Published by Mineralogical Society in Clay Minerals
- Vol. 24 (3) , 531-538
- https://doi.org/10.1180/claymin.1989.024.3.06
Abstract
Bayerite forms a cascading, travertine-like deposit over volcanic tuffs on Raoul Island in the South Pacific where it is produced from episodic discharge of spent, caustic aluminate solutions from a hydrogen generator. Textural evidence indicates microbial activity has possibly been involved in formation of the hydroxide, as well as sodium carbonate aluminate, present in minor amounts. X-ray powder diffraction and infrared spectral studies failed to give confident identification of the bayerite, the identity being confirmed by laser Raman spectroscopy. A high quality spectrum was obtained extending from 3280 to 3680 cm−1 and from 100 to 1000 cm−1.Keywords
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