Uranyl sulphite

A basic uranyl sulphite, 5(UO2)2SO3.UO2(OH)2.10H2O, has been described, but that this is a definite compound may be questioned. 

Uranium Sulphite.—The existence of normal uranous sulphite has not been established. The addition of a saturated solution of an alkali sulphite to uranous chloride solution precipitates a greyish-green basic sulphite of composition UO.SO3.2H2O. When solutions of uranyl salts are treated with sodium bisulphite, a reddish-browm precipitate is produced which dissolves in excess of the reagent by boiling such solutions the above basic sulphite is again precipitated. It is insoluble in water, but dissolves in a solution of sulphurous acid. 

---