Sodium diuranate

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Crystal structure
Structure of sodium diuranate
__ Na +      __ U 6+      __ O 2−
General
Surname Sodium diuranate
other names

yellow uranium oxide ( yellow oxide of uranium )

Ratio formula Na 2 U 2 O 7
Brief description

yellow to orange powder

External identifiers / databases
CAS number 13721-34-1
EC number 237-286-3
ECHA InfoCard 100,033,882
PubChem 160982
Wikidata Q418442
properties
Molar mass 634.03 g mol −1
Physical state

firmly

density

6.44 g cm −3

Hazard and safety information
Radioactive
Radioactive
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary
06 - Toxic or very toxic 08 - Dangerous to health 09 - Dangerous for the environment

danger

H and P phrases H: 330-300-373-411
P: ?
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Sodium diuranate is a chemical compound made up of sodium , uranium and oxygen . It also comes as a hexa hydrate Na 2 U 2 O 7 · 6 H 2 prior to O. Also known is Natriumuranat with the empirical formula Na 2 UO 4 . Together with ammonium diuranate , it is produced in the production of yellow cake .

use

Sodium diuranate is used as:

  • Intermediate product in the deposition of uranium from uranium ore solutions (precipitates when sodium hydroxide is added).
  • Dye for glasses ( uranium glass ) and enamels .

literature

  • Ingmar Grenthe, Janusz Drożdżynński, Takeo Fujino, Edgar C. Buck, Thomas E. Albrecht-Schmitt, Stephen F. Wolf: Uranium , in: Lester R. Morss, Norman M. Edelstein, Jean Fuger (eds.): The Chemistry of the Actinide and Transactinide Elements , Springer, Dordrecht 2006; ISBN 1-4020-3555-1 , pp. 253-698 ( doi : 10.1007 / 1-4020-3598-5_5 ).

Individual evidence

  1. ↑ a b IbiLabs: MSDS ( Memento from October 9, 2010 in the Internet Archive ).
  2. ↑ Entry on uranium compounds in the GESTIS substance database of the IFA , accessed on February 1, 2016 (JavaScript required)
  3. ↑ Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry uranium compounds with the exception of those specified elsewhere in this Annex in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA) , accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
  4. ↑ The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling.
  5. ↑ External identifiers or database links for sodium uranium: CAS number: 13510-99-1, EC number: 236-846-4, ECHA InfoCard: 100.033.482 , Wikidata : Q2661725 .
  6. ↑ Energy Worlds.
  7. ↑ Pressed glass correspondence (PDF; 31 kB).