Buserite

The solid substrate, sodium birnessite, was prepared from sodium-buserite. Na-buserite was prepared according to the method outlined by Giovanoli et al. (20). Conversion of Na-buserite to Na-birnessite was accomplished by drying the solid at 120°C for 24 hrs in air. X-ray diffraction analysis of Na-birnessite exhibited peaks at 7.3, 3.5, 2.4 and 1.4. The... 

Most of the Mn(IV) oxide minerals listed in table 8.3 occur in weathered continental rocks, and often constitute important manganese ore deposits. However, several of the minerals, notably todorokite, bimessite, vemadite and, perhaps, buserite and asbolane, are major constituents of seafloor hydrothermal crusts near spreading centres and in manganese nodule deposits. 

Bums, R. G., Bums, V. M. Stockman, H. W. (1983) A review of the todorokite-buserite problem implications to the mineralogy of marine manganese nodules. Amer. Mineral., 68, 972-80. 

Chukhrov, F. V., Gorshkov, A. I., Drits, L. E., Shterenberg, A. V. Sakharov, B. A. (1983) Mixed-layer asbolane-buserite minerals and asbolane in oceanic iron-manganese concretions. Izvest. Akad. Nauk, SSSR, Ser. Geol., 5,91-9. [Transl. Intern. Geol. Rev., 25, 838-47 (1983).]... 

MnOj X HjO with a crystallographic layer structure, the interval between the layers is 10 A). This mineral is called Buserite or Todorokite . It displays strong ion exchange properties especially for transition metals. The ion exchange decreases in following order Cu, Co, Zn, Ni, Na, Ca, Mg . ... 

Todorokite, an iron-free hydrous manganese oxide, is often referred to as lOA manganite or as buserite. Transmission electron microscopy. 

Buserite lOA manganite NaMn oxide hydrate Bums and Bums (1979) Collapses to 7A birnessite upon heating. Not an approved mineral name. 

Jeffries D. A. and Stumm W. (1976) The metal-adsorption chemistry of buserite. Can. Mineral. 14, 16-22. 

S. Wong and S. Cheng, Synthesis and Characterization of Pillared Buserite. Inorg Chem., 1992, 31, 1165-1172. 

Chukhrov, F.V., Gorshkov, A.I., Drits, V.A., Shterenberg, L.Ye., Sivtsov, A.V. and Sakharov, B.A., 1983. Mixed-layered asbolite-buserite minerals and asbolite in oceanic iron-manganese nodules. International Geological Review, 25 838-847. 

Manceau, A., Drits, V.A., Silvester, E., Bartoli, C. and Lanson, B., 1997. Structural mechanism of Co oxida-tion by the phyllomanganate buserite. American Mine-ralogist, 82 1150-1175. 

Usui, A. and Mita, N., 1995. Geochemistry and mineralogy of a modern buserite deposit from a hot spring in Hokkaido, Japan. Clays and Clay Minerals, 43 116-127. 

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