Solubility of Scandium Cesium Double Sulfate CsSc(SO4)2 in Sulfuric Acid Solutions

Cesium sulfatoscandate CsSc(SO 4 ) 2 (space group P , a = b = 5.0971(1) Å, c = 8.6924(5) Å, V = 195.580(2) Å 3 , Z = 1) has been crystallized from aqueous solutions in layered hexagonal prisms sized up to 50 µm and up to 2–5 µm thick. Its water solubility is 0.0104 mol/L at 25 ± 1°С. A way to reduce...

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Bibliographic Details
Published in:Russian journal of inorganic chemistry 2023-12, Vol.68 (12), p.1818-1823
Main Authors: Pasechnik, L. A., Medyankina, I. S., Tyutyunnik, A. P., Bamburov, V. G.
Format: Article
Language:English
Subjects:
Aqueous solutions
Cesium
Chemistry
Chemistry and Materials Science
Crystallization
Inorganic Chemistry
Metal compounds
Physicochemical Analysis of Inorganic Systems
Prisms
Scandium
Solubility
Sulfuric acid
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Summary:Cesium sulfatoscandate CsSc(SO 4 ) 2 (space group P , a = b = 5.0971(1) Å, c = 8.6924(5) Å, V = 195.580(2) Å 3 , Z = 1) has been crystallized from aqueous solutions in layered hexagonal prisms sized up to 50 µm and up to 2–5 µm thick. Its water solubility is 0.0104 mol/L at 25 ± 1°С. A way to reduce the solubility of scandium as CsSc(SO 4 ) 2 is to increase acidity to 3.5–5.5 М H 2 SO 4 and add Cs 2 SO 4 . Experimental evidence is supported by calculations that took into account changes in the ionic strength of the solution and the influence of the simultaneous presence of Cs + and ions. The results will be useful for those who will study the behavior of rare-metal compounds having similar properties and their separation.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023623602088