
1) Semiconductor material
Found on
https://www.crosswordclues.com/clue/uranium-dioxide

==Production== Uranium dioxide is produced by reducing uranium trioxide with hydrogen. This reaction plays an important part in the creation of nuclear fuel through nuclear reprocessing and uranium enrichment. ==Chemistry== ===Structure=== The solid is isostructural with (has the same structure as) fluorite (calcium fluoride). In addition, the dio...
Found on
http://en.wikipedia.org/wiki/Uranium_dioxide

(from the article `ceramic composition and properties`) The second structure (Figure 2B) is called fluorite, after the mineral calcium fluoride (CaF2), which possesses this structurethough the material ... ...elements. For example, the light-water reactor (LWR), which is the most widely used variety for commercial power generation...
Found on
http://www.britannica.com/eb/a-z/u/16

a black, crystalline compound, UO, insoluble in water, used in nuclear fuel rods, in ceramics, and pigments. Also called
Found on
https://www.infoplease.com/dictionary/uranium-dioxide
No exact match found.