Nomenclature
CAS number: 12036-71-4
O
4U; mol wt 302.03.
O 21.19%, U 78.81%.
UO
4.
Description and references
Exists as a di- or tetrahydrate. Prepd from
UO2(NO3)2.6H2O: Watt et al., J. Am. Chem. Soc. 72, 3341 (1950); Boggs, El-Chehabi, ibid. 79, 4258 (1957); Sato, J. Appl. Chem. 13, 361 (1963).
Derivative
Dihydrate.
Properties
Hygroscopic, pale yellow crystals. Dec slowly
in the temp range 90-195° to form a different peroxide U2O7, an orange, hygroscopic solid which dec to UO3 and oxygen on contact with water, and to uranyl salts and oxygen
on contact with acids. At temps of 200° and above, the dec of UO4.2H2O leads to UO3 without the formation
of U2O7.Status
This monograph has been retired and is no longer subject
to revision or update.