Comment: |
synthetic hydrous Mn oxide; SSA fixed on the basis of theoretical calculations, "Using literature values of unit-cell measurements for Na-birnessite structures (Drits et al., 1997) and MnO2 formula weight (Giovanoli et al., 1970), the theoretical maximum surface area available, assuming that both sides of the unit cell are available for sorption, is a*b=5.17 A ° *2.85 A ° =44,370 m2/mol MnO2*2=746 m2/g." |