Stability of perchlorate hydrates and their liquid solutions at the Phoenix landing site, Mars

  title={Stability of perchlorate hydrates and their liquid solutions at the Phoenix landing site, Mars},
  author={V. Chevrier and J. Hanley and T. Altheide},
  journal={Geophysical Research Letters},
[1] We studied the low-temperature properties of sodium and magnesium perchlorate solutions as potential liquid brines at the Phoenix landing site. We determined their theoretical eutectic values to be 236 ± 1 K for 52 wt% sodium perchlorate and 206 ± 1 K for 44.0 wt% magnesium perchlorate. Evaporation rates of solutions at various concentrations were measured under martian conditions, and range from 0.07 to 0.49 mm h ―1 for NaClO 4 and from 0.06 to 0.29 mm h ―1 for Mg(ClO 4 ) 2 . The… Expand

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