Nomenclature
CAS number: 7783-22-4
Ammonium uranium oxide ((NH
4) 2U
2O
7); ammonium diuranate.
H
8N
2O
7U
2; mol wt 624.13.
H 1.29%, N 4.49%, O 17.94%, U 76.28%.
(NH
4)
2U
2O
7.
Description and references
Incorrectly called “Uranium Yellow”; the true uranium yellow is sodium uranate. Prepn: Miller,
Armstrong, US 2466118 (1949 to USAEC); Tridot, Ann. Chim. [12] 5, 358 (1950).
Properties
Reddish-yellow, amorphous powder. Practically
insol in water, alkalies. Sol in acids or in ammonium carbonate soln.Use
Painting black on porcelain; as reagent for alkaloids;
prepn of UO
2 and UF
4.