Uranium diboride

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Crystal structure
Crystal structure
__ U 6+      __ B 3−
General
Surname Uranium diboride
Ratio formula UB 2
Brief description

fire-resistant solid

External identifiers / databases
CAS number 12007-36-2
EC number 234-508-0
ECHA InfoCard 100,031,358
PubChem 82795
Wikidata Q3026500
properties
Molar mass 259.65 g mol −1
Physical state

firmly

density

12.7 g cm −3

Melting point

2430 ° C

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 .

Urandiboride is a chemical compound made from uranium and boron .

presentation

Urandiboride can be obtained from the reaction of uranium (III) hydride with boron at 1300–1400 ° C.

properties

Urandiboride is a very stable, fireproof compound that is insoluble in water. It reacts faster with oxygen than pure uranium, but slower with water and nitrogen.

use

Possibilities are being investigated to bind uranium-containing radioactive waste as uranium diboride and thus enable long-term safe storage. Furthermore, uranium diboride is used in radiation therapy , where it is implanted in the form of microspheres directly into the areas to be treated in the body and remains there for a longer period of time.

See also

Individual evidence

  1. ↑ a b c d SLAC: Physical Constants of Inorganic Compounds (PDF; 391 kB).
  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. ^ A b American Society for Testing and Materials: Materials in Nuclear Applications . ASTM International, 1960, pp. 295, 299 ( limited preview in Google Book search).
  6. ↑ Bild der Wissenschaft : New process should make the storage of uranium and plutonium safer .