biostudies-literatureSklute ECNASA285-295https://www.ebi.ac.uk/biostudies/studies/S-EPMC5901898biostudies-literatureUnknown302Salts with high hydration states have the potential to maintain high levels of relative humidity (RH) in the near subsurface of Mars, even at moderate temperatures. These conditions could promote deliquescence of lower hydrates of ferric sulfate, chlorides, and other salts. Previous work on deliquesced ferric sulfates has shown that when these materials undergo rapid dehydration, such as that which would occur upon exposure to present day Martian surface conditions, an amorphous phase forms. However, the fate of deliquesced halides or mixed ferric sulfate-bearing brines are presently unknown. Here we present results of rapid dehydration experiments on Ca-, Na-, Mg- and Fe-chloride brines and multi-component (Fe₂ (SO₄)₃ ± Ca, Na, Mg, Fe, Cl, HCO₃)IcarusAmorphous salts formed from rapid dehydration of multicomponent chloride and ferric sulfate brines: Implications for Mars.PMC5901898NNX12AO45GRogers ADGregerson JCReeder RJSklute ECJensen HBDyar MDfalseAmorphous salts formed from rapid dehydration of multicomponent chloride and ferric sulfate brines: Implications for Mars.Salts with high hydration states have the potential to maintain high levels of relative humidity (RH) in the near subsurface of Mars, even at moderate temperatures. These conditions could promote deliquescence of lower hydrates of ferric sulfate, chlorides, and other salts. Previous work on deliquesced ferric sulfates has shown that when these materials undergo rapid dehydration, such as that which would occur upon exposure to present day Martian surface conditions, an amorphous phase forms. However, the fate of deliquesced halides or mixed ferric sulfate-bearing brines are presently unknown. Here we present results of rapid dehydration experiments on Ca-, Na-, Mg- and Fe-chloride brines and multi-component (Fe₂ (SO₄)₃ ± Ca, Na, Mg, Fe, Cl, HCO₃)2018-01-01T00:00:00Z2018 Mar2025-04-25T20:43:11.668Z2019-03-26T23:29:36ZS-EPMC59018982967030210.1016/j.icarus.2017.11.018