Phase equilibria and phase diagram of the quaternary system (Li+, Mg2+//Cl-, borate-H2O) at 308.15 K

doi:10.11949/0438-1157.20201690

Abstract

Abstract:

Solid-liquid phase equilibria and phase diagrams for the quaternary system (Li⁺, Mg²⁺//Cl^-, borate–H₂O) were investigated, and the compositions in liquid phase, densities, refractive indices and pH were measured experimentally by using isothermal dissolution equilibrium method. There are five minerals corresponding to LiCl·H₂O, Li₂B₄O₇·3H₂O, MgCl₂·6H₂O, Mg₂B₆O₁₁·15H₂O, and the lithium carnallite LiCl·MgCl₂·7H₂O existed in this system. Mg₂B₆O₁₁·15H₂O occupies the greatest part of phase region, while LiCl·MgCl₂·7H₂O covers the smallest. The mineral LiCl·MgCl₂·7H₂O belongs to the incongruent double salt, and hungchaoite (MgB₄O₇·9H₂O) is transformed into Mg₂B₆O₁₁·15H₂O in the concentrated MgCl₂ aqueous solution. The crystalline area of inderite is the largest, indicating that magnesium borate is easy to crystallize, while the crystalline area of lithium carnallite is the smallest. The solubility of this quaternary system were predicted using Pitzer thermodynamics model, and the calculated solubility agreed well with experimental data. The phase equilibrium study of this quaternary system (Li⁺, Mg²⁺//Cl^-, borate-H₂O) will provide a theoretical basis to promote the development of lithium, magnesium and boron products and to guide the comprehensive utilization of this precious salt lake brine resources.

Key words: salt lake brine system, phase equilibria and phase diagram, lithium salts, magnesium borate, Pitzer model

摘要：

采用等温溶解平衡法，开展四元体系Li⁺， Mg²⁺//Cl^-， borate–H₂O固液相平衡与相图研究，测定平衡溶液的液相组成、密度、折射率和pH。该四元体系相图中存在的盐类矿物为：LiCl·H₂O、Li₂B₄O₇·3H₂O、 MgCl₂·6H₂O、Mg₂B₆O₁₁·15H₂O和锂光卤石LiCl·MgCl₂·7H₂O，其中锂光卤石LiCl·MgCl₂·7H₂O是异成分复盐，溶液中MgCl₂存在下章氏硼镁石（MgB₄O₇·9H₂O）不稳定，转化为多水硼镁石（Mg₂B₆O₁₁·15H₂O）。多水硼镁石结晶区最大，表明镁硼酸盐易于结晶析出，而锂光卤石结晶区最小。采用Pitzer热力学模型对该四元体系的溶解度进行理论预测，计算相图与实验相图吻合较好。该四元体系的稳定相平衡与相图研究，可为含锂硼盐湖老卤中锂、镁、硼产品开发及其综合利用提供理论依据。

关键词: 盐湖卤水体系, 相平衡与相图, 锂盐, 镁硼酸盐, Pitzer模型

CLC Number:

O 642.4⁺2

LI Dongchan, WANG Jiayu, WANG Shiqiang. Phase equilibria and phase diagram of the quaternary system (Li⁺, Mg²⁺//Cl^-, borate-H₂O) at 308.15 K[J]. CIESC Journal, 2021, 72(6): 3170-3178.

李栋婵, 王嘉宇, 王士强. 四元体系（Li⁺， Mg²⁺//Cl^-， borate-H₂O）308.15 K相平衡与相图研究[J]. 化工学报, 2021, 72(6): 3170-3178.

Figures/Tables 8

References 35

1	Choubey P K, Kim M S, Srivastava R R, et al. Advance review on the exploitation of the prominent energy-storage element: lithium(I). From mineral and brine resources[J]. Minerals Engineering, 2016, 89: 119-137.
2	Yu X P, Fan X B, Guo Y F, et al. Recovery of lithium from underground brine by multistage centrifugal extraction using tri-isobutyl phosphate[J]. Separation and Purification Technology, 2019, 211: 790-798.
3	高世杨, 宋彭生, 夏树屏, 等. 盐湖化学:新类型硼锂盐湖[M]. 北京: 科学出版社, 2007.
	Gao S Y, Song P S, Xia S P, et al. Salt Lake Chemistry: A New Type Brine Containing Lithium and Boron[M]. Beijing: Science Press, 2007.
4	邓天龙, 王士强, 郭亚飞. 柴达木盆地盐湖卤水体系介稳相平衡与相图[M]. 北京: 科学出版社, 2017.
	Deng T L, Wang S Q, Guo Y F. Metastable Phase Equilibria and Phase Diagram of Brine System in Qaidam Basin[M]. Beijing: Science Press, 2017.
5	Liu X H, Chen X Y, He L H, et al. Study on extraction of lithium from salt lake brine by membrane electrolysis[J]. Desalination, 2015, 376: 35-40.
6	Ji Z Y, Chen Q B, Yuan J S, et al. Preliminary study on recovering lithium from high Mg²⁺/Li⁺ ratio brines by electrodialysis[J]. Separation and Purification Technology, 2017, 172: 168-177.
7	Lee D H, Ryu T, Shin J, et al. Selective lithium recovery from aqueous solution using a modified membrane capacitive deionization system[J]. Hydrometallurgy, 2017, 173: 283-288.
8	Wang S L, Zheng S L, Wang Z M, et al. Superior lithium adsorption and required magnetic separation behavior of iron-doped lithium ion-sieves[J]. Chemical Engineering Journal, 2018, 332: 160-168.
9	Liu X H, Zhong M L, Chen X Y, et al. Separating lithium and magnesium in brine by aluminum-based materials[J]. Hydrometallurgy, 2018, 176: 73-77.
10	Shi D, Zhang L C, Peng X W, et al. Extraction of lithium from salt lake brine containing boron using multistage centrifuge extractors[J]. Desalination, 2018, 441: 44-51.
11	Gao D L, Yu X P, Guo Y F, et al. Extraction of lithium from salt lake brine with triisobutyl phosphate in ionic liquid and kerosene[J]. Chemical Research in Chinese Universities, 2015, 31(4): 621-626.
12	张杰, 史学伟, 赵双良, 等. 水盐体系相平衡研究进展[J]. 化工学报, 2016, 67(2): 379-389.
	Zhang J, Shi X W, Zhao S L, et al. Progress in study on phase equilibria of salt-water systems[J]. CIESC Journal, 2016, 67(2): 379-389.
13	Fu C, Sang S H, Zhou M F, et al. Phase equilibria in the ternary systems Li₂B₄O₇-MgB₄O₇-H₂O and K₂B₄O₇-MgB₄O₇-H₂O at 273 K[J]. Journal of Chemical & Engineering Data, 2016, 61(3): 1071-1077.
14	Wang S Q, Du X M, Jing Y, et al. Solid-liquid phase equilibrium in the ternary systems (Li₂B₄O₇ + MgB₄O₇ + H₂O) and (Na₂B₄O₇ + MgB₄O₇ + H₂O) at 298.15 K[J]. Journal of Chemical & Engineering Data, 2017, 62(1): 253-258.
15	郭智忠, 刘子琴, 陈敬清. Li⁺, Mg²⁺/Cl^-, SO₄^2--H₂O 四元体系(25℃)的介稳平衡[J]. 化学学报, 1991, 49(10): 937-943.
	Guo Z Z, Liu Z Q, Chen J Q. The metastable phase equilibrium in the system Li⁺, Mg²⁺∥Cl^-, SO₄^2--H₂O at 25℃[J]. Acta Chimica Sinica, 1991, 49(10): 937-943.
16	Gao J, Deng T L. Metastable phase equilibrium in the aqueous quaternary system (LiCl + MgCl₂ + Li₂SO₄ + MgSO₄ + H₂O) at 308.15 K[J]. Journal of Chemical & Engineering Data, 2011, 56(4): 1452-1458.
17	Meng L Z, Yu X P, Li D, et al. Solid-liquid metastable equilibria of the reciprocal quaternary system (LiCl + MgCl₂ + Li₂SO₄ + MgSO₄ + H₂O) at 323.15 K[J]. Journal of Chemical & Engineering Data, 2011, 56(12): 4627-4632.
18	Yu X P, Wang Q, Guo Y F, et al. Metastable phase equilibrium in the reciprocal quaternary system LiCl+MgCl₂+Li₂SO₄+MgSO₄+H₂O at 348.15 K and 0.1 MPa[J]. Chemical Research in Chinese Universities, 2018, 34(5): 798-802.
19	Li H X, Zeng D W, Yao Y, et al. Solubility phase diagram of the quaternary system Li⁺, Mg²⁺//Cl^-, SO₄^2--H₂O at 298.15 K: experimental redetermination and model simulation[J]. Industrial & Engineering Chemistry Research, 2014, 53(18): 7579-7590.
20	桑世华, 张婷婷, 傅超, 等. 四元体系Li⁺, K⁺, Mg²⁺//B₄O₇^2–-H₂O 273 K相平衡[J]. 化工学报, 2017, 68(9): 3343-3349.
	Sang S H, Zhang T T, Fu C, et al. Phase equilibria in quaternary system Li⁺, K⁺, Mg²⁺//B₄O₇^2–-H₂O at 273 K[J]. CIESC Journal, 2017, 68(9): 3343-3349.
21	Tan Q, Zeng Y, Mu P T, et al. Stable phase equilibrium of aqueous quaternary system Li⁺, K⁺, Mg²⁺//borate-H₂O at 348 K[J]. Journal of Chemical & Engineering Data, 2014, 59(12): 4173-4178.
22	Wang S Q, Song Y, Du X M, et al. Solubilities, densities, and refractive indices in the quaternary system (Li₂B₄O₇ + Na₂B₄O₇ + Mg₂B₆O₁₁ + H₂O) at 298.15 K[J]. Russian Journal of Inorganic Chemistry, 2018, 63(1): 116-120.
23	Wang S Q, Du X M, Jing Y, et al. Phase and physicochemical properties diagrams of quaternary system Li₂B₄O₇ + Na₂B₄O₇ + Mg₂B₆O₁₁ + H₂O[J]. Russian Journal of Physical Chemistry A, 2017, 91(13): 2503-2507.
24	宋彭生, 付宏安. 四元交互体系Li⁺, Mg²⁺/SO42-, B4O72--H₂O 25℃溶解度和溶液物化性质的研究[J]. 无机化学学报, 1991, 7(3): 344-348.
	Song P S, Fu H A. Solubilities and properties of solution in the reciprocal system Li⁺, Mg²⁺/SO₄^2-, B₄O₇^2--H₂O at 25℃[J]. Chinese Journal of Inorganic Chemistry, 1991, 7(3): 344-348.
25	Li H C, Ni S J, Zeng Y. Phase equilibrium of the quaternary system containing lithium, magnesium, sulfate, and borate in aqueous solution at 308 K[J]. Journal of Chemical & Engineering Data, 2014, 59(8): 2523-2529.
26	高世扬,许开芬,李刚,等.盐卤硼酸盐化学V:合硼浓缩盐卤稀释过程中硼酸盐的行为[J].化学学报,1986,44(12):1229-1233.
	Gao S Y, Xu K F, Li G, et al. Chemistry of borate in salt lake brine V. Study on the behaviour of borate in salt lake brine during dilution[J]. Acta Chimica Sinica, 1986, 44(12): 1229-1233.
27	孙柏, 宋彭生. 某些镁硼酸盐溶解及相转化的研究[J]. 盐湖研究, 1999, 7(2): 16-22.
	Sun B, Song P S. Study on solution and phase transformation of some magnesium borates[J]. Journal of Salt Lake Research, 1999, 7(2): 16-22.
28	景燕. 合成章氏硼镁石的新方法[J]. 海湖盐与化工, 2000, 29(2): 24-25.
	Jing Y. A new method of synthesis of hungtsaoite [J]. Sea-Lake Salt and Chemical Industry, 2000, 29(2): 24-25.
29	邓天龙, 周桓, 陈侠. 水盐体系相图及应用[M]. 北京: 化学工业出版社, 2013.
	Deng T L, Zhou H, Chen X. Salt-water System Phase Diagrams and Applications[M]. Beijing: Chemical Industry Press, 2013.
30	Wang M M, Guo W T, Wang S Q, et al. Solubilities, densities, and refractive indices of the ternary system (NaBO₂ + KBO₂ + H₂O) at T=(298.15 and 323.15) K and P=0.1 MPa[J]. Journal of Chemical & Engineering Data, 2020, 65(11): 5184-5191.
31	袁菲, 宋江涛, 胡佳音, 等. 四元体系CaCl₂-CaSO₄-CaB₆O₁₀-H₂O 308.15 K相平衡研究[J]. 化工学报, 2020, 71(1): 209-215.
	Yuan F, Song J T, Hu J Y, et al. Phase equilibria of quaternary system CaCl₂-CaSO₄-CaB₆O₁₀-H₂O at 308.15 K[J]. CIESC Journal, 2020, 71(1): 209-215.
32	中国科学院青海盐湖研究所分析室. 卤水和盐的分析方法[M]. 北京: 科学出版社, 1988.
	Qinghai Institute of Salt Lakes of CAS. Analytical Methods of Brines and Salts[M]. 2nd ed. Beijing: Science Press, 1988.
33	Gao J, Guo Y F, Wang S Q, et al. Interference of lithium in measuring magnesium by complexometry: discussions of the mechanism[J]. Journal of Chemistry, 2013, 2013: 1-4.
34	Marion G M, Farren R E. Mineral solubilities in the Na-K-Mg-Ca-Cl-SO₄-H₂O system: a re-evaluation of the sulfate chemistry in the Spencer-Møller-Weare model[J]. Geochimica et Cosmochimica Acta, 1999, 63(9): 1305-1318.
35	Song P S, Sun B, Zeng D W. Solubility phenomena studies concerning brines in China[J]. Pure and Applied Chemistry, 2013, 85(11): 2097-2116.

No.	Composition of liquid phase（w）/%					J?necke index（J）			Solid phase
No.	Li⁺	Mg²⁺	Cl^-	B₄O₇^2-	H₂O	J(Mg²⁺)	J(B₄O₇^2-)	J(H₂O)	Solid phase
1,E₁	0.28	0.01	0.00	3.20	96.51	2.00	100.15	26028.88	Inderite+Lb
2	0.30	0.01	0.51	2.31	96.87	1.87	67.57	24416.78	Inderite+Lb
3	0.33	0.01	0.88	1.88	96.90	1.70	50.08	22241.73	Inderite+Lb
4	0.44	0.01	1.55	1.65	96.35	1.28	33.10	16657.46	Inderite+Lb
5	0.50	0.02	1.99	1.35	96.14	2.23	23.60	14485.54	Inderite+Lb
6	0.64	0.03	2.89	1.02	95.42	2.61	13.88	11189.12	Inderite+Lb
7	0.86	0.05	4.12	0.92	94.05	3.21	9.26	8156.13	Inderite+Lb
8	1.47	0.09	7.51	0.58	90.35	3.38	3.41	4576.09	Inderite+Lb
9	2.08	0.10	10.70	0.40	86.72	2.67	1.67	3126.82	Inderite+Lb
10	2.88	0.10	14.88	0.27	81.87	1.94	0.82	2147.90	Inderite+Lb
11,F₁	3.44	0.11	17.76	0.21	78.48	1.79	0.54	1726.44	Inderite+Lb+Lc
12	3.35	0.11	17.31	0.24	78.99	1.84	0.63	1783.48	Lb+Lc
13	4.04	0.10	20.83	0.18	74.85	1.39	0.39	1407.75	Lb+Lc
14,E₂	6.55	0.00	33.36	0.18	59.91	0.00	0.25	704.81	Lb+Lc
15,E₃	5.34	2.21	33.72	0.00	58.73	19.12	0.00	685.45	Bis+Lc
16	4.09	0.01	20.86	0.13	74.91	0.14	0.28	1409.36	Inderite+Lc
17	4.18	0.02	21.33	0.13	74.34	0.27	0.28	1366.70	Inderite+Lc
18	4.10	0.10	21.18	0.18	74.44	1.37	0.39	1379.83	Inderite+Lc
19	5.61	1.15	31.76	0.49	60.99	10.48	0.70	749.93	Inderite+Lc
20	6.47	1.70	37.79	0.50	53.54	13.05	0.60	554.45	Inderite+Lc
21	5.85	2.17	36.01	0.41	55.56	17.48	0.52	603.90	Inderite+Lc
22,F₂	5.58	2.37	35.19	0.56	56.30	19.52	0.72	625.69	Inderite+Lc+Lcar
23	5.26	2.41	33.63	0.59	58.11	20.74	0.79	674.72	Inderite+Lcar
24,E₄	4.93	2.84	33.44	0.00	58.79	24.76	0.00	691.41	Bis+Lcar
25,F₃	4.85	2.68	32.14	0.96	59.37	23.99	1.35	716.98	Inderite+Lcar+Bis
26	3.99	4.12	31.84	1.19	58.86	37.10	1.68	715.03	Inderite+Bis
27	2.54	5.65	29.22	0.55	62.04	55.96	0.85	828.95	Inderite+Bis
28	2.07	6.34	28.75	0.70	62.14	63.63	1.10	841.36	Inderite+Bis
29	2.10	6.15	28.40	0.57	62.78	62.58	0.91	861.92	Inderite+Bis
30	1.37	4.96	21.23	0.51	71.93	67.40	1.09	1318.76	Inderite+Bis
31	0.83	4.24	16.39	0.46	78.08	74.47	1.27	1850.29	Inderite+Bis
32	0.41	3.66	12.57	0.44	82.92	83.60	1.57	2555.37	Inderite+Bis
33,E₅	0.00	3.19	9.12	0.42	87.27	100.00	2.06	3690.87	Inderite+Bis

No.	Composition of liquid phase（w）/%					J?necke index（J）			Solid phase
No.	Li⁺	Mg²⁺	Cl^-	B₄O₇^2-	H₂O	J(Mg²⁺)	J(B₄O₇^2-)	J(H₂O)	Solid phase
1,E₁	0.28	0.01	0.00	3.20	96.51	2.00	100.15	26028.88	Inderite+Lb
2	0.30	0.01	0.51	2.31	96.87	1.87	67.57	24416.78	Inderite+Lb
3	0.33	0.01	0.88	1.88	96.90	1.70	50.08	22241.73	Inderite+Lb
4	0.44	0.01	1.55	1.65	96.35	1.28	33.10	16657.46	Inderite+Lb
5	0.50	0.02	1.99	1.35	96.14	2.23	23.60	14485.54	Inderite+Lb
6	0.64	0.03	2.89	1.02	95.42	2.61	13.88	11189.12	Inderite+Lb
7	0.86	0.05	4.12	0.92	94.05	3.21	9.26	8156.13	Inderite+Lb
8	1.47	0.09	7.51	0.58	90.35	3.38	3.41	4576.09	Inderite+Lb
9	2.08	0.10	10.70	0.40	86.72	2.67	1.67	3126.82	Inderite+Lb
10	2.88	0.10	14.88	0.27	81.87	1.94	0.82	2147.90	Inderite+Lb
11,F₁	3.44	0.11	17.76	0.21	78.48	1.79	0.54	1726.44	Inderite+Lb+Lc
12	3.35	0.11	17.31	0.24	78.99	1.84	0.63	1783.48	Lb+Lc
13	4.04	0.10	20.83	0.18	74.85	1.39	0.39	1407.75	Lb+Lc
14,E₂	6.55	0.00	33.36	0.18	59.91	0.00	0.25	704.81	Lb+Lc
15,E₃	5.34	2.21	33.72	0.00	58.73	19.12	0.00	685.45	Bis+Lc
16	4.09	0.01	20.86	0.13	74.91	0.14	0.28	1409.36	Inderite+Lc
17	4.18	0.02	21.33	0.13	74.34	0.27	0.28	1366.70	Inderite+Lc
18	4.10	0.10	21.18	0.18	74.44	1.37	0.39	1379.83	Inderite+Lc
19	5.61	1.15	31.76	0.49	60.99	10.48	0.70	749.93	Inderite+Lc
20	6.47	1.70	37.79	0.50	53.54	13.05	0.60	554.45	Inderite+Lc
21	5.85	2.17	36.01	0.41	55.56	17.48	0.52	603.90	Inderite+Lc
22,F₂	5.58	2.37	35.19	0.56	56.30	19.52	0.72	625.69	Inderite+Lc+Lcar
23	5.26	2.41	33.63	0.59	58.11	20.74	0.79	674.72	Inderite+Lcar
24,E₄	4.93	2.84	33.44	0.00	58.79	24.76	0.00	691.41	Bis+Lcar
25,F₃	4.85	2.68	32.14	0.96	59.37	23.99	1.35	716.98	Inderite+Lcar+Bis
26	3.99	4.12	31.84	1.19	58.86	37.10	1.68	715.03	Inderite+Bis
27	2.54	5.65	29.22	0.55	62.04	55.96	0.85	828.95	Inderite+Bis
28	2.07	6.34	28.75	0.70	62.14	63.63	1.10	841.36	Inderite+Bis
29	2.10	6.15	28.40	0.57	62.78	62.58	0.91	861.92	Inderite+Bis
30	1.37	4.96	21.23	0.51	71.93	67.40	1.09	1318.76	Inderite+Bis
31	0.83	4.24	16.39	0.46	78.08	74.47	1.27	1850.29	Inderite+Bis
32	0.41	3.66	12.57	0.44	82.92	83.60	1.57	2555.37	Inderite+Bis
33,E₅	0.00	3.19	9.12	0.42	87.27	100.00	2.06	3690.87	Inderite+Bis

No.	J(Mg²⁺)	Density, ρ/(g·cm^-3)	n_D	pH
1,E₁	2.00	1.0262	1.3400	9.195
2	1.87	1.0248	1.3421	9.173
3	1.70	1.022	1.3432	9.160
4	1.28	1.0241	1.3503	9.036
5	2.23	1.0267	1.3584	9.026
6	2.61	1.0281	1.3680	8.806
7	3.21	1.0300	1.3768	8.524
8	3.38	1.0484	1.3750	8.314
9	2.67	1.0694	1.3852	8.134
10	1.94	1.0957	1.4213	7.961
11,F₁	1.79	1.1199	1.3400	7.669
12	1.84	1.1256	1.3421	7.791
13	1.39	1.1429	1.3432	6.826
14,E₂	0.00	1.2498	1.3503	4.821
15,E₃	19.12	1.3121	1.4354	3.992
16	0.14	1.1412	1.3849	6.066
17	0.27	1.1447	1.3861	5.762
18	1.37	1.1483	1.3871	5.914
19	10.48	1.2581	1.4217	4.409
20	13.05	1.3178	1.4369	4.071
21	17.48	1.3190	1.438	3.961
22,F₂	19.52	1.3207	1.4365	3.971
23	20.74	1.3191	1.4362	3.962
24,E₄	24.76	1.3090	1.4348	4.007
25,F₃	23.99	1.3187	1.4351	3.946
26	37.10	1.3180	1.4331	3.952
27	55.96	1.3208	1.4353	4.021
28	63.63	1.3252	1.4373	3.986
29	62.58	1.3258	1.4375	3.967
30	67.40	1.3285	1.4389	4.001
31	74.47	1.3296	1.4398	4.012
32	83.60	1.3311	1.4407	4.023
33,E₅	100.00	1.3375	1.4428	4.112

No.	J(Mg²⁺)	Density, ρ/(g·cm^-3)	n_D	pH
1,E₁	2.00	1.0262	1.3400	9.195
2	1.87	1.0248	1.3421	9.173
3	1.70	1.022	1.3432	9.160
4	1.28	1.0241	1.3503	9.036
5	2.23	1.0267	1.3584	9.026
6	2.61	1.0281	1.3680	8.806
7	3.21	1.0300	1.3768	8.524
8	3.38	1.0484	1.3750	8.314
9	2.67	1.0694	1.3852	8.134
10	1.94	1.0957	1.4213	7.961
11,F₁	1.79	1.1199	1.3400	7.669
12	1.84	1.1256	1.3421	7.791
13	1.39	1.1429	1.3432	6.826
14,E₂	0.00	1.2498	1.3503	4.821
15,E₃	19.12	1.3121	1.4354	3.992
16	0.14	1.1412	1.3849	6.066
17	0.27	1.1447	1.3861	5.762
18	1.37	1.1483	1.3871	5.914
19	10.48	1.2581	1.4217	4.409
20	13.05	1.3178	1.4369	4.071
21	17.48	1.3190	1.438	3.961
22,F₂	19.52	1.3207	1.4365	3.971
23	20.74	1.3191	1.4362	3.962
24,E₄	24.76	1.3090	1.4348	4.007
25,F₃	23.99	1.3187	1.4351	3.946
26	37.10	1.3180	1.4331	3.952
27	55.96	1.3208	1.4353	4.021
28	63.63	1.3252	1.4373	3.986
29	62.58	1.3258	1.4375	3.967
30	67.40	1.3285	1.4389	4.001
31	74.47	1.3296	1.4398	4.012
32	83.60	1.3311	1.4407	4.023
33,E₅	100.00	1.3375	1.4428	4.112

Species	β⁽⁰⁾	β⁽¹⁾	β⁽²⁾	C^?	θ	ψ
LiCl	0.1469	0.3134	—	-0.00324	—	—
MgCl₂	0.3455	1.6987	—	0.05489	—	—
Li₂B₄O₇	5.9118	-37.298	—	-7.3439	—	—
MgB₄O₇	-1.7318	6.2356	-139.94	-1.4978	—	—
Li⁺, Mg²⁺	—	—	—	—	-0.00743	—
Cl^-, B₄O₇^2-	—	—	—	—	0.05252	—
Li⁺,Mg²⁺,Cl^-	—	—	—	—	—	0.00
Li⁺,Mg²⁺,B₄O₇^2-	—	—	—	—	—	0.00
Li⁺, Cl^-,B₄O₇^2-	—	—	—	—	—	1.0857
Mg²⁺,Cl^-,B₄O₇^2-	—	—	—	—	—	0.7383

Phase equilibria and phase diagram of the quaternary system (Li⁺, Mg²⁺//Cl^-, borate-H₂O) at 308.15 K

四元体系（Li⁺， Mg²⁺//Cl^-， borate-H₂O）308.15 K相平衡与相图研究

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