Figure 2From: Formation of todorokite from “c-disordered” H+-birnessites: the roles of average manganese oxidation state and interlayer cationsHR-TEM images of “c-disordered” Na-H-birnessites with different Mn(VII)/Mn(II) ratios. a, b 0.42-Na-H-Bir; c, d 0.52-Na-H-Bir; e, f 0.67-Na-H-Bir.Back to article page