An experimental study on phase equilibria at 288 K in the quinary system Li + + Na + + K + + SO 4 2-+ B 4 O 7 2-+ H 2 O was performed using the isothermal evaporation method. Equilibrium solubility and density of the solution were measured. The equilibrium phase diagram for the solution saturated with the salt Li 2 B 2 O 4 ‚16H 2 O was constructed. The phase diagram of this system consists of 7 invariant points, 14 univariant curves, and 8 crystallization fields corresponding to potassium tetraborate pentahydrate (K 2 B 4 O 7 ‚5H 2 O), borax (Na 2 B 4 O 7 ‚10H 2 O), potassium sulfate, lithium sulfate monohydrate (Li 2 SO 4 ‚H 2 O), sodium sulfate, lithium-potassium sulfate double salt (Li 2 SO 4 ‚K 2 SO 4 ), lithium-sodium sulfate double salt (Li 2 SO 4 ‚Na 2 SO 4 ), and potassium-sodium sulfate double salt (3K 2 SO 4 ‚Na 2 SO 4 ). There are three kinds of double salts formed in the system. The crystallization forms of lithium and potassium borate were K 2 B 4 O 7 ‚5H 2 O and Li 2 B 2 O 4 ‚16H 2 O, respectively, which are different from the usual forms of K 2 B 4 O 7 ‚4H 2 O and Li 2 B 4 O 7 ‚3H 2 O that occur at stable equilibrium.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.