Buserite Structure

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 . ... 

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. 

Langel W, Parinello M (1994) Hydrolysis at stepped MgO surfaces. Phys Rev Lett 73 504-507 Lanson B, Drits VA, Silvester E, Manceau A (2000) Structure of H-exchanged hexagonal bimessite and its mechanism of formation from Na-rich monoclinic buserite at low pH. Am Mineral 85 826-838 LCLS (1998) LCLS Design Study Report. SLAC-R-521, Revised December 1998, UC-414, Stanford Linear Accelerator Center, Stanford, CA... 

Manceau A, Drits VA, Silvester E, Bartoli C, Lanson (1997) Structural mechanism of Co2+ oxidation by the phyllomanganate buserite. Am Mineral 82 1150-1175... 

Manceau A, Drits VA, Silvester E, Bartoli C, Lanson (1997) Structural mechanism of Co(II) oxidation by the phyllomanganate, Na-buserite. Am Mineral 82 1150-1175 Manceau A, Gates W (1997) Surface structural model for ferrihydrite. Clays Clay Miner 43 448-460 Manceau A, Gorshkov Al, Drits VA (1992) Structural chemistry of Mn, Fe, Co, and Ni in Mn hydrous oxides. II. Information from EXAFS spectroscopy, electron and X-ray diffraction. Am Mineral 77 1144-1157... 

Troger L, Arvanitis D, Baberschke K, Michaeis H, Grimm U, Zschech E (1992) Full correction of the selfabsorption in soft-fluorescence extended x-ray absorption fine structure. Phys Rev B46 3283-3289 Usui A, Mita N (1995) Geochemistry and mineralogy of a modem buserite deposit from a hot spring in Hokkaido, Japan. Clays Clay Miner 43 116-127... 

Manganese Oxide Hydroxides, IV. The Buserite Group Structure Stabilized by Transition Elements, Chimia 1975, 29, 517-520. 

In the conventional precipitation and sol-gel routes, the resultant bimessite or buserite materials are usually Na type or K type, in which the cations are located in the interlayers, and MnOe octahedral units form the Cdl2-type structure in the layers. The stmcture and propaties of bimessite and buserite can be modified to load other cations, including alkali metals, alkaline earths, and transition metals, via two pathways. One pathway is interlayer substitution via ion exchange method at room temperature [14,22]. In this process, Na- or K-bimessite are stirred in a solution of dopants. Divalent metal cations, such as Mg ", Ni ", Co ", have been successfully ion exchanged with Na-birnessite mataials and used to prepare todorokite-type materials with tunnel stractures [22],... 

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