Extended Data Fig. 4: Comparison of VNIR spectra of the manganese oxide mineral detected at Endeavor crater, Mars, and produced in Mn(II) oxidation experiments.
From: Formation of manganese oxides on early Mars due to active halogen cycling
Solids produced from oxidation of dissolved Mn(II) by bromate in (a) magnesium chloride and (b) magnesium sulfate fluids. The labels indicate the initial pH of the samples. See Extended Data Table 5 for complete sample details.
