Extended Data Fig. 8: Species present in frozen ammonium-sodium-chloride-carbonate brine mixtures.

Species present in frozen ammonium-sodium-chloride-carbonate brine mixtures from ref. ²². Solution 1 was prepared with an equal amount of sodium and ammonium ions. Solution 2 was prepared at room temperature and was composed of 0.6 M [Na⁺], 3.6 M [NH₄⁺], 3.6 M [Cl⁻], and 0.3 M [CO₃ ²⁻]. Solution 3 was prepared at room temperature and composed of 3.1 M [Na⁺], 0.6 M [NH₄⁺], 3.1 M [Cl⁻], and 0.3 M [CO₃²⁻]. See ref. ²² for details.