ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Solid-Liquid Phase Equilibria in the System NH₄Cl-MgCl₂-H₂O at Elevated Temperatures the Pseudobinary System MgCl₂.6H₂O - NH₄Cl

T. Fanghänel, H. Voigt, and H.-H. Emons

Karlsruhe Centre for Nuclear Research, Institute of Nuclear Waste Technology, W-7500 Karlsruhe, Germany

Abstract: The solid-liquid phase equilibria of the pseudobinary system MgCl₂ . 6H₂O-NH₄Cl were determined in the temperature range 120-250°C. Between 120-183°C ammonium carnallite NH₄Cl . MgCl₂ . 6H₂O forms the stable solid phase, which melts congruently at 183-degrees-C. At higher temperatures solid solutions of the composition (NH₄Cl)_6.65 . MgCl₂ . 2H₂O are stable. The NH₄Cl/MgCl₂ mole ratio of the solid solutions is almost independent of temperature, if the H₂O/MgCl₂ mole ratio of the liquid phase is kept constant.

Full paper in Portable Document Format: 466a374.pdf

Chemical Papers 46 (6) 374–377 (1992)