The filtrate contains the uranium as uranous and the iron as ferrous salt.
It fires when heated in air, and dissolves in acids to form uranous salts.
If forms two series of salts, one, the uranous compounds, are derived from the oxide U02, the other, the uranyl compounds, contain the divalent group U02.
Uranous hydrate is obtained as reddish-brown flakes by precipitating a uranous solution with alkali.
With hydroflouric acid it yields uranous fluoride, UF 4, which forms double salts of the type MF UF 4.
Uranous bromide, UBr4, and uranous iodide, U14, also exist.