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Solubilities, Densities, and Refractive Indices of Ternary Systems (LiB5O8 + RbB5O8 + H2O) and (NaB5O8 + RbB5O8 + H2O) at 308.15 K and 0.1 MPa

  • PHYSICOCHEMICAL ANALYSIS OF INORGANIC SYSTEMS
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Abstract

Solid-liquid phase equilibria of the two ternary systems (LiB5O8 + RbB5O8 + H2O) and (NaB5O8 + RbB5O8 + H2O) were investigated at T = 308.15 K and p = 0.1 MPa by the isothermal solution equilibrium method. The experimental results show that the phase diagrams of the systems (LiB5O8 + RbB5O8 + H2O) and (NaB5O8 + RbB5O8 + H2O) at 308.15 K contain one invariant point, two univariant curves and two crystallization regions. The area of the crystallization region of RbB5O8·4H2O is much larger than that of LiB5O8·5H2O in the former system and that of NaB5O8·5H2O in the latter system. Owing to the different solubilities of the salts in the aqueous systems, the solubility of RbB5O8 in the solution decreased obviously with the increasing concentration of LiB5O8 or NaB5O8 in either ternary system, indicating that both have a relatively strong effect on the solubility of RbB5O8. It was found that both systems belong to the simple eutectic type, and neither double salts nor solid solutions were formed.

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Funding

The work was supported by the Program of the National Natural Science Foundation of China (22078247), and the Kunlun Talents Program: High-End Innovative and Entrepreneurial Talents of Qinghai Province.

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Authors and Affiliations

  1. College of Marine and Environmental Sciences, Tianjin University of Science and Technology, 300457, Tianjin, China

    Su Zhang, Hui-hui Cheng, Ya-fei Guo & Shi-qiang Wang

  2. Qinghai Institute of Salt Lakes of Chinese Academy of Sciences, 810008, Xining, China

    Shi-qiang Wang

  3. Key Laboratory of Marine Resource Chemistry and Food Technology (TUST), Ministry of Education, 300457, Tianjin, China

    Ya-fei Guo & Shi-qiang Wang

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  1. Su Zhang
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  2. Hui-hui Cheng
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Correspondence to Shi-qiang Wang.

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Su Zhang, Cheng, Hh., Guo, Yf. et al. Solubilities, Densities, and Refractive Indices of Ternary Systems (LiB5O8 + RbB5O8 + H2O) and (NaB5O8 + RbB5O8 + H2O) at 308.15 K and 0.1 MPa. Russ. J. Inorg. Chem. 68, 1896–1902 (2023). https://doi.org/10.1134/S0036023623602222

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