Figure 4From: Formation of todorokite from “c-disordered” H+-birnessites: the roles of average manganese oxidation state and interlayer cationsXRD patterns of Mg2+-exchanged intermediates and reflux products for the synthetic “c-disordered” H+-birnessites at different times. a 0.42-Na-H-Bir, b 0.52-Na-H-Bir, c 0.67-Na-H-Bir, d 0.52-K-H-Bir, e 0.52-H-Bir. Tod todorokite, Bir birnessite, Man manganite, Ram ramsdellite.Back to article page