Aug 20 2013
Topics Covered
Description
Applications
Chemical Properties
Electrical Properties
Thermal and Mechanical Properties
Safety Information
Description
Uranium dioxide is an oxide of uranium produced by reducing uranium trioxide with hydrogen. It is a black, radioactive, crystalline powder that naturally occurs in the mineral uraninite. It is capable of withstanding high temperatures of about 2300°C and is resistant to radiation damage.
Applications
Uranium dioxide finds applications in the following areas:
-
Rechargeable batteries
-
Photoelectrochemical cells
-
Catalyst and radiation shielding material
-
Color glass and ceramics
-
Nuclear fuel.
Chemical Properties
The chemical properties of uranium dioxide are provided in the table below:
|
Chemical Properties |
|
Chemical Formula |
UO2 |
|
Molecular Weight |
270.03 |
|
CAS No. |
1344-57-6 |
|
Group |
Uranium – NA
Oxygen - 16 |
|
Crystal Structure |
Cubic |
Electrical Properties
The electrical properties of uranium dioxide are provided in the table below:
|
Electrical Properties |
|
Dielectric Constant |
22 |
|
Band Gap |
1.3eV |
Thermal and Mechanical Properties
The thermal and mechanical properties of uranium dioxide are provided in the tables below:
|
Thermal Properties |
|
Heat of Formation |
-1084 kJ/mol |
|
Standard Molar Entropy |
78 J mol-1 K-1 |
|
Mechanical Properties |
|
Density |
10.97 g/cm3 |
|
Melting Point |
2865°C |
Safety Information
|
Safety Information |
|
Risk Statements |
R26/28 - Very toxic by inhalation and if swallowed
R33 - Danger of cumulative effects
R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
|
Safety Statements |
S1/2 - Keep locked up and out of the reach of children
S20/21 - When using do not eat, drink or smoke
S45 - In case of accident or if you feel unwell seek medical advice immediately
S61 - Avoid release to the environment. Refer to special instructions/safety data sheet. |