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Uranium(IV) oxide

  • Name Uranium(IV) oxide
  • EINECS215-700-3
  • CAS No. 1344-57-6
  • Densityg/cm3
  • PSA34.14000
  • LogP-0.23760
  • SolubilityN/A
  • Melting Point2500oC
  • FormulaO2U
  • Boiling Point°Cat760mmHg
  • Molecular Weight270.028
  • Flash Point°C
  • Transport InformationN/A
  • AppearanceN/A
  • SafetyA radioactive material. It ignites spontaneously in heated air and burns brilliantly. See also URANIUM.
  • Risk CodesR26/28; R33; R51/53
  • Molecular Structure
    Molecular Structure of 1344-57-6 (Uranyl(VI) chloride)
  • Hazard SymbolsHigh radiation risk. Ignites spontaneously in finely divided form.
  • SynonymsHigh radiation risk. Ignites spontaneously in finely divided form.
  • Article Data9

Uranium(IV) oxide Synthetic route

uranium

201230-82-2

carbon monoxide

A

1344-57-6

uranium dioxide

B

12035-97-1

uranium monoxide

C

151265-41-7

CUO(CO)

Conditions
ConditionsYield
In solid matrix codeposition of U atoms, Ar and CO onto a cold substrate at 10 K;; not isolated; detn. by IR spectroscopy;;

uranium

124-38-9

carbon dioxide

A

1344-57-6

uranium dioxide

B

12035-97-1

uranium monoxide

E

151269-73-7

OU(CO)2

Conditions
ConditionsYield
In solid matrix byproducts: CO; codeposition of U atoms, Ar and CO2 onto a cold substrate at 10 K;; not isolated; detn. by IR spectroscopy;;

C112H162Cl2Li2N10P6Si6U2

100-52-7

benzaldehyde

A

1344-57-6

uranium dioxide

B

C38H44N2P2Si2

C

C23H25PSi

Conditions
ConditionsYield
In benzene-d6 at 20℃; for 1h; Inert atmosphere;

C47H57ClN2P3Si3U(1-)*C18H36N2O6*Li(1+)

100-52-7

benzaldehyde

A

1344-57-6

uranium dioxide

B

C38H44N2P2Si2

C

C23H25PSi

Conditions
ConditionsYield
In benzene-d6 at 20℃; for 0.5h; Inert atmosphere;

C61H77N6P3Si3U

100-52-7

benzaldehyde

A

1344-57-6

uranium dioxide

B

C38H44N2P2Si2

C

C23H25PSi

Conditions
ConditionsYield
In benzene-d6 at 20℃; for 12h; Inert atmosphere;

C112H162Cl2Li2N10P6Si6U2

642-31-9

9-anthracene aldehyde

A

1344-57-6

uranium dioxide

B

1282040-50-9

C46H48N2P2Si2

C

C31H29PSi

Conditions
ConditionsYield
In benzene-d6 at 20℃; for 1h; Inert atmosphere;

C47H57ClN2P3Si3U(1-)*C18H36N2O6*Li(1+)

642-31-9

9-anthracene aldehyde

A

1344-57-6

uranium dioxide

B

1282040-50-9

C46H48N2P2Si2

C

C31H29PSi

Conditions
ConditionsYield
In benzene-d6 at 20℃; for 12h; Inert atmosphere;

C61H77N6P3Si3U

642-31-9

9-anthracene aldehyde

A

1344-57-6

uranium dioxide

B

1282040-50-9

C46H48N2P2Si2

C

C31H29PSi

Conditions
ConditionsYield
In benzene-d6 at 20℃; for 16h; Inert atmosphere;

uranium oxide

1344-57-6

uranium dioxide

Conditions
ConditionsYield
at 650℃; for 18h; Inert atmosphere;

uranium(IV) aspartate

1344-57-6

uranium dioxide

Conditions
ConditionsYield
at 160℃; for 30h; Time; Autoclave; High pressure;

Uranium(IV) oxide Chemical Properties

IUPAC Name: Dioxouranium
CAS: 1344-57-6
EINECS: 215-700-3
Following is the Molecular Structure of Uranium(iv) oxide (1344-57-6):

SMILES: O=[U]=O
InChI: InChI=1/2O.U/rO2U/c1-3-2
InChIKey: FCTBKIHDJGHPPO-YEMCAWSEAK
Std.InChI: InChI=1S/2O.U
Std.InChIKey: FCTBKIHDJGHPPO-UHFFFAOYSA-N
Molecular Formula: O2U
Molecular Weight: 270.03
Melting Point: 2865℃
Density: 10.97g/cm3

Uranium(IV) oxide Uses

 Uranium(iv) oxide (1344-57-6)  is used mainly as nuclear fuel,specifically as UO2 or as a mixture of UO2 and PuO2 ( Plutonium dioxide ) called a mixed oxide (MOX fuel) for fuel rods in nuclear reactors.

Uranium(IV) oxide Safety Profile

Hazard Codes:  T+ Very Toxic,  N Dangerous for the environment.
Risk Statements: 26/28-33-51/53
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: 20/21-45-61
S20/21: When using, do not eat, drink or smoke.
S45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible).
S61: Avoid release to the environment. Refer to special instructions safety data sheet.
RIDADR: 2912
HazardClass: 7
PackingGroup: III
A radioactive material. It ignites spontaneously in heated air and burns brilliantly.

Uranium(IV) oxide Specification

 Uranium(iv) oxide (1344-57-6) also can be called for Uranium dioxide ; Uranium(IV) oxide ; Uranium oxide brown-black ; Uranium oxide ; UO2 ; Uranium oxide(UO2) ; Uranium(4) oxide,red ; Uraniumoxide(UO2) . Uranium(iv) oxide (1344-57-6) is an oxide of Uranium ,and is a black, radioactive, crystalline powder that naturally occurs in the mineral Uraninite . Uranium(iv) oxide (1344-57-6)  is a semiconductor material. Its band gap is about 1.3 eV, which lies between the band gap for Silicon and Gallium arsenide , near the optimum for efficiency vs band gap curve for absorption of solar radiation, suggesting its possible use for very efficient solar cells based on Schottky diode structure; it also absorbs at five different wavelengths, including infrared, further enhancing its efficiency. Its intrinsic conductivity at room temperature is about the same as of single crystal Silicon .

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