Ferric hydroxysulfate
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Ferric hydroxysulfate (Fe3+SO4OH) is a mineral located on Mars. It was discovered in the year 2025 by Bishop et al (2025) on Mars in the Aram Chaos crater and on the plateau above Juventae Chasma.[1]
This mineral is formed by hydrous Fe2+ sulfates being heated to 100 °C or above which was provided from the deposition of ash and lava or by hydrothermal processes. Then hydrated ferrous sulfates are oxidated.[1] The sulfates this mineral contains were likely left behind by sulfate-rich pools of water slowly drying up.[2]
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