Uranium oxide (UO2) (1344-57-6)

 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 .