Oxidation of Manganese and Formation of Mn(3)O(4) (Hausmannite) by Spore Coats of a Marine Bacillus sp.
Isolated spore coats of a marine Bacillus species were incubated in 25 mM MnCl(2) at pH 7.5. Manganese precipitates, formed on the coat surfaces, were analyzed by transmission electron microscopy, electron diffraction, and energy-dispersive X-ray spectroscopy. Initially, an amorphous manganese oxide was observed on the coats which recrystallized to hausmannite after prolonged incubation in the MnCl(2) solution. The spore coats catalyze the oxidation of Mn(II) and have no structural influence on the final mineral phase precipitated.
Mann
S
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School of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom, and Department of Biochemistry, Leiden University, Wassenaarseweg 64, 2333 AL Leiden, The Netherlands.
Sparks
N H
NH
Scott
G H
GH
de Vrind-de Jong
E W
EW