Figure 7
Distributions of Ni, Zn, Mn and Fe in a soil nodule are shown in the upper row. The corresponding distributions of goethite, birnessite, phyllosilicate and lithiophorite are shown in the bottom row. All distributions are plotted in negative-contrast grayscale so that high concentrations are shown as dark areas. We see that the distribution of Ni matches that of lithiophorite and does not match those of the other minerals. |