Degeneracy of the limited series of solid solutions in the NaCl-KCl-NH4Cl-H2O system at 50°C

Phase Equilibria of Aqueous Ternary Systems NH4Cl + CaCl2 + H2O and NH4Cl + MgCl2 + H2O at 308.2 K: Measurement and Calculation

“…Until now, the phase equilibria of aqueous salts containing ammonium at multiple temperatures have been reported. For example, there are only two crystallization regions of NH 4 Cl and LiCl·2H 2 O at 273.2 K in the ternary system LiCl + NH 4 Cl + H 2 O, while the crystallization region of the solid solution (NH 4 Cl) x (LiCl·H 2 O) 1– x is formed at 298.2 and 323.2 K. , The solid solutions (NH 4 Cl) x (KCl) 1– x and (NH 4 Cl) 1– x (KCl) x are formed in the system KCl + NH 4 Cl + H 2 O at 273.2, 283.2, 298.2, and 308.2 K. − The quaternary system NH 4 Cl + SrCl 2 + AlCl 3 + H 2 O and its ternary subsystems NH 4 Cl + SrCl 2 + H 2 O and NH 4 Cl + AlCl 3 + H 2 O at 298.2 K are simple types, neither a double salt nor a solid solution formed. − The quaternary system NaCl + KCl + NH 4 Cl + H 2 O at 323.2 K formed the solid solutions (NH 4 Cl) x (KCl) 1– x and (NH 4 Cl) 1– x (KCl) x . For the quaternary system NaCl + NH 4 Cl + MgCl 2 + H 2 O at 273.2, 298.2, 333.2, and 348.2 K, − the crystallization region of the double salt NH 4 Cl·MgCl 2 ·6H 2 O exists.…”