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Trivalent gallium compounds are structural analogs of the elements with variable valency in (+3) oxidation state that can be used as cathode materials for electrochemical power devices (iron, vanadium, chromium). Literature data about gallium(III) sulfate are quite scarce. So, we developed a preparation technique for synthesizing Ga2(SO4)3 from Ga(CH3COO)2OH as a starting material. The latter was dissolved in sulfuric acid. Then gallium(III) sulfate hydrate was precipitated under cooling. The obtained precipitate is extremely hygroscopic, and it deliquesces quickly under aerobic ambient conditions. The synthesized gallium(III) sulfate hydrate was dried on the filter and then kept in vacuum at 10-2 torr for two hours to remove traces of water and acetic acid. Gallium(III) sulfate, its intermediates and products of its thermal treatment were studied by differential thermal analysis (DTA) and X-ray diffraction phase analysis. The content of crystallization water in gallium(III) sulfate hydrate was determined, and the composition of the crystallohydrate was established as Ga2(SO4)3·18H2O. (The original X-ray diffraction pattern of the latter is disclosed below in this paper.) The mentioned crystallohydrate lost its water in six steps within 40-350 °С temperature range and formed anhydrous Ga2(SO4)3, which, in turn, decomposed at 700 °С and produced nanocrystalline gallium oxide, Ga2O3. Anhydrous gallium(III) sulfate is slightly hygroscopic, so it should be stored in a desiccator. It was found that propanol-2 (isopropanol) can be used to precipitate gallium(III) sulfate from aqueous sulfuric acid: isopropanol extracts acetic acid and, thus, exhibits salting-out activity. The formed amorphous precipitate partially loses its mass when heated up to 400 °С. However, a single phase Ga2(SO4)3 specimen could not be synthesized by this method. Considering similarities between gallium and indium, it can be assumed that Ga2(SO4)3 precipitate is contaminated by gallium oxosulfate.

About the Authors

V. Yu. Proydakova
Moscow Technological University (Institute of Fine Chemical Technologies)
Russian Federation
Moscow 119571, Russia

S. V. Kuznetsov
A.M. Prokhorov Institute of General Physics
Russian Federation
Moscow 119991, Russia

V. V. Voronov
A.M. Prokhorov Institute of General Physics
Russian Federation
Moscow 119991, Russia

P. Fedorov
A.M. Prokhorov Institute of General Physics
Russian Federation

Moscow 119571, Russia

Moscow 119991, Russia


1. Palacin M.R. Recent advances in rechargeable battery materials: a chemist’s perspective // Chem. Soc. Rev. 2009. V. 38. P. 2565–2575.

2. Dunn B., Kamath H., Tarascon J.M. Electrical energy storage for the grid: a battery of choices // Science. 2011. V. 1334. P. 928–935.

3. Wang Y., Li H., Chen M., Yang X., Jiang D. Synthesis and electrochemical performance of LiFePO4/C cathode materials from Fe2O3 for high-power lithium-ion batteries // Ionics. 2017. V. 23. № 2. P. 377–384.

4. Xiang X., Zhang K., Chen J. Recent advances and prospects of cathode materials for sodium-ion batteries // Adv. Mater. 2015. V. 27. P. 5343–5364.

5. Barpanda P., Oyama G., Ling C.D., Yamada A. Krohnkite-type Na2Fe(SO4)2·2H2O as a novel 3.25 V insertion compound for Na-ion batteries // Chem. Mater. 2014. V. 26. P. 1297–1299.

6. Ivanova R.V. Khimiya i tekhnologiya galliya [Chemistry and technolodgy of gallium]. Moscow: Metallurgiya Publ., 1973. 320 p. (in Russ.).

7. Fedorov P.I., Mokhosoev M.V., Alexeev F.P. Khimiya galliya, indiya i talliya [Chemistry of gallium, indium and tallium]. Novosibirsk: Nauka Publ., 1977. 224 p. (in Russ.).

8. Yatcenko S.P. Solubility isotherm in the Ga2O3-SO3-H2O system at 20-degrees // Zhurn. neorg. khimii (Russian J. Inorg. Chem.). 1961. V. 6. P. 1922–1925 (in Russ.).

9. Fricke R., Blencke W. Beiträge zur chemie des galliums // Z. anorg. allg. Chem. 1925. B.143. S. 183–193.

10. Kokkoros P.A. Röntgenuntersuchung der wasserfreien Sulfate der dreiwertigen Metalle Eisen, Chrom und Gallium // Tscher. Miner. Petrog. 1965. V. 10. P. 45–51.

11. Krause M., Gruehn R. Contributions on the thermal behavior of sulphates. XVII. Single crystal structure refinements of In2(SO4)3 and Ga2(SO4)3 // Z. Krist. 1995. Bd. 210. S. 427–431.

12. Baudler M., Brauer G., Feher F., F. Huber, Klement R., Kwasnik W., Schenk P.W., Schmeisser M., Steudel R. Handbuch der praparativen Anorganischen Chemie. Stuttgart: Enke Verlag, 1975. 608 s.

13. Fedorov P.I., Jiang Chi-Juing. The system Na, Al//SO4 // Zhurn. neorg. khimii (Russian J. Inorg. Chem.). 1966. V. 11. № 3. P. 669–671 (in Russ.).

14. Fedorov P.I., Akchurin R.H. Indium. М.: Nauka Publ., 2000. 276 p. (in Russ.); Peking: Ed. Peking University Press, 2005 (in Chinese).


For citations:

Proydakova V.Yu., Kuznetsov S.V., Voronov V.V., Fedorov P. SyNTHESIS OF GALLIUM SULFATE. Fine Chemical Technologies. 2017;12(3):52-57. (In Russ.)

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