Uranyl oxalate

Uranyl oxalate
Names
Other names
Uranyl oxalate trihydrate; uranyl oxalate hydrate
Identifiers
CAS Number
  • 2031-89-2
3D model (JSmol)
  • Interactive image
ChemSpider
  • 11588161
PubChem CID
  • 22717423
CompTox Dashboard (EPA)
  • DTXSID40942455 Edit this at Wikidata
InChI
  • InChI=1S/C2H2O4.2O.U/c3-1(4)2(5)6;;;/h(H,3,4)(H,5,6);;;/q;;;+2/p-2
    Key: PRWGGWFEEGTKSV-UHFFFAOYSA-L
  • C(=O)(C(=O)[O-])[O-].O=[U+2]=O
Properties
Chemical formula
 UO2C2O4
Molar mass 358 g/mole (412 g/mol as trihydrate)
Appearance Pale yellow powder
Solubility in water
 Partially soluble
Related compounds
Related uranium oxides
 Uranyl peroxide
Triuranium octoxide
Uranium dioxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Chemical compound

Uranyl oxalate (UO2C2O4) is a pale yellow powdered uranyl salt. It is often encountered in industrial nuclear processes at both the front and back-end of the nuclear fuel cycle. Due to its hygroscopicity, uranyl oxalate rarely exists in the dehydrated state and is usually instead found in the trihydrate form (UO2C2O4·3H2O) at room temperature.[1] At room temperature, the powder exhibits a monoclinic crystal structure in the P21/c space group.[2]

Production

Uranyl oxalate trihydrate can be produced by the reaction of uranyl nitrate hexahydrate with oxalic acid.[3]

Uranyl oxalate has been used in actinometers.[4]

References

  1. ^ Thompson, Nathan B. A.; Stennett, Martin C.; Gilbert, Matthew R.; Hyatt, Neil C. (2021-01-06). "Nuclear forensic signatures and structural analysis of uranyl oxalate, its products of thermal decomposition and Fe impurity dopant". Journal of Radioanalytical and Nuclear Chemistry. 327 (2): 957–973. doi:10.1007/s10967-020-07538-2. ISSN 0236-5731.
  2. ^ Jayadevan, N. C.; Chackraburtty, D. M. (1972-11-15). "The crystal and molecular structure of uranyl oxalate trihydrate". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry. 28 (11): 3178–3182. Bibcode:1972AcCrB..28.3178J. doi:10.1107/s0567740872007691. ISSN 0567-7408.
  3. ^ Tel, H; Bülbül, M; Eral, M; Altaş, Y (November 1999). "Preparation and characterization of uranyl oxalate powders". Journal of Nuclear Materials. 275 (2): 146–150. Bibcode:1999JNuM..275..146T. doi:10.1016/s0022-3115(99)00119-1. ISSN 0022-3115.
  4. ^ Bryce-Smith, D. (1971). Photochemistry. Royal Society of Chemistry. p. 279. ISBN 978-0-85186-015-2.
  • v
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Compounds of the oxalate ion
(H2C2O4) He
Li2C2O4 BeC2O4 +BO3 +CO3 (NH4)2C2O4
+NO3 		O F Ne
Na2C2O4
NaHC2O4 		MgC2O4 Al Si +PO4
+PO3 		+SO4 +Cl Ar
K2C2O4
KHC2O4 		CaC2O4 Sc Ti V CrC2O4 MnC2O4 FeC2O4
Fe2(C2O4)3
+Fe
humboldtine
+NH4 +Na +K +K 		CoC2O4 -Ni CuC2O4 Katsarosite Ga2(C2O4)3 Ge As Se Br Kr
Rb2C2O4 SrC2O4 Y2(C2O4)3 Zr Nb(HC2O4)5 Mo Tc Ru Rh Pd Ag2C2O4 CdC2O4 In2(C2O4)3 SnC2O4 Sb Te I Xe
Cs2C2O4 BaC2O4 * Lu2(C2O4)3 Hf Ta W Re Os Ir -Pt Au Hg Tl PbC2O4 Bi Po At Rn
Fr Ra ** Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
 
* La2(C2O4)3 Ce2(C2O4)3 Pr2(C2O4)3 Nd2(C2O4)3 Pm2(C2O4)3 Sm2(C2O4)3 Eu2(C2O4)3 Gd2(C2O4)3 Tb2(C2O4)3 Dy2(C2O4)3 Ho2(C2O4)3 Er2(C2O4)3 Tm2(C2O4)3 Yb2(C2O4)3
** Ac2(C2O4)3 Th(C2O4)2 Pa UO2C2O4 Np(C2O4)2 Pu(C2O4)2 Am Cm2(C2O4)3 Bk2(C2O4)3 Cf2(C2O4)3 Es2(C2O4)3 Fm Md No