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Uranium(VI) oxide

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Identification
Molecular formula
UO2
CAS number
1344-57-6
IUPAC name
dioxouranium
State
State

In most conditions, especially at room temperature, uranium(VI) oxide is a solid.

Melting point (Celsius)
2 865.00
Melting point (Kelvin)
3 138.15
Boiling point (Celsius)
2 200.00
Boiling point (Kelvin)
2 473.15
General information
Molecular weight
270.03g/mol
Molar mass
270.0290g/mol
Density
10.9700g/cm3
Appearence

Uranium(VI) oxide appears as a yellow to light green crystalline solid or powder. It is often found in the form of granules or as a pressed and sintered pellet used in nuclear fuel rods.

Comment on solubility

Solubility of Dioxouranium

Dioxouranium, represented by the chemical formula UO2, exhibits specific solubility characteristics that are important for various applications, particularly in the fields of nuclear chemistry and materials science. The solubility of dioxouranium in water is relatively low, which can be attributed to:

  • Complex Formation: Dioxouranium can form complexes with other ligands, influencing its solubility depending on the presence of ion-concentrating species.
  • pH Dependency: The solubility can vary widely with changes in pH. Generally, at higher pH levels, dioxouranium becomes less soluble, while lower pH can lead to increased solubility.
  • Ionic Strength: The ionic strength of the surrounding solution plays a role. In solutions with high ionic strength, solubility might be reduced due to the shielding effect on the charged species.

As a result, the interaction of dioxouranium with its environment significantly affects its solubility. This characteristic is essential when considering its transport, availability for reactions, and potential environmental impact. Understanding the solubility behavior of UO2 not only aids in waste management strategies but also enhances our knowledge in the development of nuclear fuels and materials.

Interesting facts

Interesting Facts about Dioxouranium

Dioxouranium, commonly encountered in various forms within the realm of nuclear chemistry, represents an important compound in the field of radiochemistry. This compound showcases unique properties and applications that are crucial to scientific research and industrial processes.

Key Characteristics:

  • Uranium Source: Dioxouranium is an oxidation state of uranium (U) at +6, making it a prominent source of uranium for nuclear fuel.
  • Oxidation State: It is particularly noteworthy as it exists in an unusual dioxidation form that affects its reactivity and interaction with other elements.
  • Applications: This compound is vital in the production of nuclear energy, as it serves as an intermediate in the processing of uranium ore into usable fuel.

Significance in Chemistry:

From a chemistry student's perspective, understanding dioxouranium is paramount, as it introduces several fascinating concepts:

  • The importance of oxidation states in determining the properties and behavior of transition metals.
  • The compound serves as a gateway to explore topics such as radioactivity, nuclear fission, and the broader impacts of uranium chemistry on the environment and energy production.

Environmental Considerations:

While dioxouranium has significant industrial applications, it also raises important environmental and safety issues:

  • Radioactive Risk: As a radioactive compound, proper handling and disposal are critical to prevent environmental contamination.
  • Research Focus: Many researchers are dedicated to understanding the long-term impacts of uranium compounds, including dioxouranium, on ecosystems and human health.

In conclusion, dioxouranium is not just a compound with industrial utility; it also embodies a plethora of scientific discussions extending from basic chemistry to environmental science. Its role in nuclear chemistry makes it a fascinating subject for both students and professionals alike.

Synonyms
Uranium dioxide
dioxouranium
1344-57-6
Uranium oxide (UO2)
EINECS 215-700-3
UNII-L70487KUZO
Uranium(4) oxide, red
L70487KUZO
Uranous oxide
Brown oxide
Black uranium oxide
Uranium (IV) oxide
DTXCID7034208
215-700-3
dtxsid8061682
uranium dioxide [mi]
Uranyl(VI) chloride
Nuclear reference material (238-U)O2 A
Q378379