Phase Diagram of the Ternary System NaBr/CsBr/H2O Elucidated by Mechanochemical Equilibration

Shmuel Yarlv; Hans J. Seifert; Jochen Uebach; Shiomo Shoval

doi:10.1021/je00006a022

Phase Diagram of the Ternary System NaBr/CsBr/H₂O Elucidated by Mechanochemical Equilibration

Shmuel Yarlv, Hans J. Seifert, Jochen Uebach, Shiomo Shoval

Earth Sciences discipline

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Abstract

Mechanochemical equilibration of the ternary system NaBr/CsBr/H₂O was investigated using a ball mill which is a closed system. Products obtained by grinding mixtures with different molar ratios of NaBr, CsBr, and H₂O were identified by X-ray diffraction, IR spectroscopy, and thermal analysis. The water content of the different species in the mixture was determined by thermogravimetry. The products of grinding are solid solutions of hydrated NaBr in CsBr, Cs_1-x[Na(H₂O)]_xBr (x ≤ 0.48), the hydrated double salt Cs[Na(H₂O)]₂Br₃, and NaBr·2H₂O. The phase diagram of the NaBr/CsBr/H₂O system was constructed for that part in which only solids exist in the equilibrium state. From the phase diagram it is obvious that the double salt cannot be crystallized from aqueous solutions.

Original language	English
Pages (from-to)	219-223
Number of pages	5
Journal	Journal of Chemical & Engineering Data
Volume	37
Issue number	2
DOIs	https://doi.org/10.1021/je00006a022
State	Published - 1 Apr 1992

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title = "Phase Diagram of the Ternary System NaBr/CsBr/H2O Elucidated by Mechanochemical Equilibration",

abstract = "Mechanochemical equilibration of the ternary system NaBr/CsBr/H2O was investigated using a ball mill which is a closed system. Products obtained by grinding mixtures with different molar ratios of NaBr, CsBr, and H2O were identified by X-ray diffraction, IR spectroscopy, and thermal analysis. The water content of the different species in the mixture was determined by thermogravimetry. The products of grinding are solid solutions of hydrated NaBr in CsBr, Cs1-x[Na(H2O)]xBr (x ≤ 0.48), the hydrated double salt Cs[Na(H2O)]2Br3, and NaBr·2H2O. The phase diagram of the NaBr/CsBr/H2O system was constructed for that part in which only solids exist in the equilibrium state. From the phase diagram it is obvious that the double salt cannot be crystallized from aqueous solutions.",

author = "Shmuel Yarlv and Seifert, {Hans J.} and Jochen Uebach and Shiomo Shoval",

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AU - Yarlv, Shmuel

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AU - Uebach, Jochen

AU - Shoval, Shiomo

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N2 - Mechanochemical equilibration of the ternary system NaBr/CsBr/H2O was investigated using a ball mill which is a closed system. Products obtained by grinding mixtures with different molar ratios of NaBr, CsBr, and H2O were identified by X-ray diffraction, IR spectroscopy, and thermal analysis. The water content of the different species in the mixture was determined by thermogravimetry. The products of grinding are solid solutions of hydrated NaBr in CsBr, Cs1-x[Na(H2O)]xBr (x ≤ 0.48), the hydrated double salt Cs[Na(H2O)]2Br3, and NaBr·2H2O. The phase diagram of the NaBr/CsBr/H2O system was constructed for that part in which only solids exist in the equilibrium state. From the phase diagram it is obvious that the double salt cannot be crystallized from aqueous solutions.

AB - Mechanochemical equilibration of the ternary system NaBr/CsBr/H2O was investigated using a ball mill which is a closed system. Products obtained by grinding mixtures with different molar ratios of NaBr, CsBr, and H2O were identified by X-ray diffraction, IR spectroscopy, and thermal analysis. The water content of the different species in the mixture was determined by thermogravimetry. The products of grinding are solid solutions of hydrated NaBr in CsBr, Cs1-x[Na(H2O)]xBr (x ≤ 0.48), the hydrated double salt Cs[Na(H2O)]2Br3, and NaBr·2H2O. The phase diagram of the NaBr/CsBr/H2O system was constructed for that part in which only solids exist in the equilibrium state. From the phase diagram it is obvious that the double salt cannot be crystallized from aqueous solutions.

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Phase Diagram of the Ternary System NaBr/CsBr/H₂O Elucidated by Mechanochemical Equilibration

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