Uranyl(VI) chloride

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 (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.

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 (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 .