Thermodynamic Modeling of Boron Species in the Ternary System Na₂O-B₂O₃-H₂O at 298.15 K

Table 1

Experimental and calculated solubilities of invariant points for the system Na₂O-B₂O₃-H₂O at 298.15 K.

No.		Na2O	B2O3	pH	Equilibrium solid phase	Ref.
A	Experimental data	0.00	3.06	4.27	H3BO3	[12]
	Experimental data	0.00	3.25	2.50	H3BO3	[27]
A	Calculated data	0.00	3.07	3.15	H3BO3	This work
E1	Experimental data	1.69	10.26	—	H3BO3 + NaB5O8·5H2O	[12]
E1	Experimental data	1.62	10.08	6.22	H3BO3 + NaB5O8·5H2O	[14]
E1	Calculated data	1.83	10.27	6.50	H3BO3 + NaB5O8·5H2O	This work
E2	Experimental data	2.73	12.73	7.18	NaB5O8·5H2O + Na2B4O7·10H2O	[12]
E2	Experimental data	2.82	12.70	—	NaB5O8·5H2O + Na2B4O7·10H2O	[14]
E2	Calculated data	2.87	13.10	6.83	NaB5O8·5H2O + Na2B4O7·10H2O	This work
E3	Experimental data	9.38	10.64	13.08	Na2B4O7·10H2O + NaBO2·4H2O	[12]
E3	Calculated data	10.34	12.08	12.73	Na2B4O7·10H2O + NaBO2·4H2O	This work