Phase equilibrium data set of ternary system LiCl(KCl)-NH4Cl-H2O

For the phase equilibrium experimental data in the dataset, isothermal dissolution equilibrium method and wet slag method were used to obtain, and solid-phase identification was performed by X-ray powder diffraction method. For the determination of the concentration of various ions in the solution, NH4+was measured using ion chromatography; K+and Li+were determined by flame atomic absorption spectroscopy; Cl - is determined using the silver nitrate volumetric method. All data were measured in parallel three times, and the final result was taken as the average of the measurements. The sources of uncertainty include Class A uncertainty assessment and Class B uncertainty assessment, which require comprehensive consideration of repeated measurements, sample sampling, sample dilution, weighing operations (involving calibration operations of volumetric flasks and pipettes, estimation errors, and temperature effects), as well as uncertainties caused by detection instruments. At the same time, relevant data from core journals and dissertations at home and abroad from 1980 to the present were retrieved and organized, and literature data that met the criteria of "clear experimental methods, high data repeatability, and traceable error range" were screened. The phase diagrams and XRD patterns were drawn using Origin drawing software. The XRD data was processed using MDI JADE 9.0 software. Phase identification of potassium ammonium and ammonium potassium solid solutions, using diffraction data of pure KCl and pure NH4Cl as comparison standards; The phase identification of lithium ammonium solid solution is based on the diffraction data of pure LiCl · H2O and pure NH4Cl as comparison standards. The solid-liquid phase equilibrium data table includes fields such as system name (e.g. "KCl-NH4Cl-H2O"), temperature (K), solid-liquid phase composition (w (NH4Cl), w (KCl)), density (g · cm-3), data source (experimental/literature), etc. The instrument and method table includes experimental instruments (name+manufacturer+model) and analytical methods (such as atomic absorption spectroscopy). Import the solid-liquid phase equilibrium data into Origin software and calculate the coordinates of each data point (such as X: w (KCl)%); Y: Draw a phase diagram with w (NH4Cl)%. The final generated phase diagram includes the crystalline phase region, solubility curve, wet slag line, and research temperature.