Uranium Dioxide

Uranium Dioxide

Image:Uranium-dioxide-3D-vdW.png Crystal structure of uranium (IV) oxide

uranium (IV) oxide

  • Formula as commonly written: UO2
  • Hill system formula: O2U1
  • CAS registry number: [1344-57-6]
  • Formula weight: 270.028
  • Class: oxide

Synonyms

  • uranium (IV) oxide
  • uranium dioxide
  • uranium oxide
  • pitchblende

Physical properties

  • Colour: dark brown
  • Appearance: crystalline solid
  • Melting point: 2827°C
  • Boiling point:
  • Density: 10970 kg m-3

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Element analysis and oxidation numbers

For each compound, and where possible, a formal oxidation
number for each element is given, but the usefulness of this number is limited,
especially so for p-block elements in particular. Based upon that
oxidation number, an electronic configuration is also given but note that for
more exotic compounds you should view this as a guide only.

Element % Formal oxidation state Formal electronic configuration
11.85 -2 [He].2s2.2p6
U 88.15 4 [Rn].5f2

Synthesis

Solid state structure

  • Geometry of uranium:
  • Prototypical structure:

Isotope pattern

What follows is the calculated isotope pattern for the UO2 unit with the most intense ion set to 100%.

Formula: U1O2

mass  %

266   0.0
267   0.7
268   0.0
269   0.0
270 100.0
271   0.1
272   0.4

HNO3

CAS #

Formula

Formula Weight

1344-57-6



UO
2

270.07

Color
Crystalline Form

Specific Gravity

Melting
Point

Boiling Point

brn-blk,cub

10.97

2827

……..

Solubility
in 100 parts

Cold Water

Hot Water

Other Reagents
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