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BET-model parameters for the binary system Mn(NO_3)_2-H_2O were obtained by fitting experimental water activities at 298.15 K. The values obtained in this work were compared to those fitted previously for the systems Ca(NO_3)_2-H_2O and Zn(NO_3)_2-H_2O, showing reasonable agreement. With the model parameters fitted at 298 K, the vapor pressure of the saturated solution for the phases Mn(NO_3)_2·6H_2O and Mn(NO_3)_2·4H_2O were predicted and shows quite good agreement with the experimental values. The phase diagram of the Mn(NO_3)_2-H_2O system reproduced by the BET model shows smaller deviation from the experimental data than that by the extended UNIQUAC model. The ternary phase diagrams of the systems Me(NO_3)_n-Mn(NO_3)_2-H_2O (Me=Mg, Ca and Li) are predicted with the binary model parameter and compared with available experimental data. The predicted eutectic compositions were given as possible heat storage materials.
BET-model parameters for the binary system Mn (NO_3) _2-H_2O were obtained by fitting experimental water activities at 298.15 K. The values obtained in this work were compared to those fitted previously for the systems Ca (NO_3) _2-H_2O and Zn (NO_3) _2-H_2O, showing reasonable agreement. With the model parameters fitted at 298 K, the vapor pressure of the saturated solution for the phases Mn (NO_3) _2 · 6H_2O and Mn (NO_3) _2 · 4H_2O were predicted and shows quite The phase diagram of the Mn (NO_3) _2-H_2O system reproduced by the BET model shows smaller deviation from the experimental data than that by the extended UNIQUAC model. The ternary phase diagrams of the systems Me (NO_3 ) _n-Mn (NO_3) _2-H_2O (Me = Mg, Ca and Li) are predicted with the binary model parameter and comparable with available experimental data. The predicted eutectic compositions were given as possible heat storage materials.