Manganese dioxides bimessite

The most commonly reported solid forms of iron and manganese oxides in marine sediments and ferromanganese nodules are goethite (aFeOOH) and hydrous manganese dioxide (bimessite, todorokite and 6Mn02) (, . The surface chemistry of... 

Arsenite can be oxidized by manganese dioxides in soils. The rate constants for the depletion of As(III) by bimessite and cryptomelane are much higher than those by pyrolusite due to the difference in the crystallinity and specific surfaces of the Mn oxides (Oscarson et al., 1983). The ability of the Mn dioxides to sorb As(III) and As(V) is related to the specific surface and the point-of-zero charge of the oxides. The one-to-one relationship between the amount of As(III) depleted and the amount of As(V) appearing in solution was reported by Oscarson and colleagues (1983). 

Bimessite, a manganese dioxide commonly present in soils, has been found to be a very effective catalyst of the browning of solutions of glucose and glycine in light, but also promotes the interaction in the dark.540 Such reactions may have a role in the formation of humic substances in the soil. 

Julien C, Massot M, Baddour-Hadjean R, Franger S, Bach S, Pereira-Ramos JP (2003) Raman spectra of bimessite manganese dioxides. Solid State Ionics 159 345-356... 

Bach S, Pereira-Ramos JP, Baffler N, Messina R (1991) Bimessite manganese dioxide synthesized via a sol-gel process a new rechargeable cathodic material for lithium batteries. Electrochim Acta 36 1595-1603... 

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