Uranium carbide

Uranium carbide
Names

IUPAC name Uranium carbide
Identifiers
CAS Number	12070-09-6^Y
3D model (JSmol)	Interactive image
PubChem CID	166603 (wrong formula)
CompTox Dashboard (EPA)	DTXSID80923541
InChI InChI=1S/C.U Key: HQMIBHMHKRSUCY-UHFFFAOYSA-N
SMILES [U].[C]
Properties
Chemical formula	UC
Molar mass	250.04 g/mol
Density	13.63 g/cm³
Melting point	2,350 °C (4,260 °F; 2,620 K)^[1]
Structure
Crystal structure	cubic, cF8
Space group	Fm3m, No. 225
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references

Chemical compound

Uranium carbide, a carbide of uranium, is a hard refractory ceramic material. It comes in several stoichiometries (x differs in UC_x), such as uranium methanide (UC, CAS number 12070-09-6), uranium sesquicarbide (U₂C₃, CAS number 12076-62-9),^[2] and uranium acetylide (UC₂, CAS number 12071-33-9).^[3]

Like uranium dioxide and some other uranium compounds, uranium carbide can be used as a nuclear fuel for nuclear reactors, usually in the form of pellets or tablets. Uranium carbide fuel was used in late designs of nuclear thermal rockets.

Uranium carbide pellets are used as fuel kernels for the US version of pebble bed reactors; the German version uses uranium dioxide instead.

As nuclear fuel, uranium carbide can be used either on its own, or mixed with plutonium carbide (PuC and Pu₂C₃). The mixture is also labeled as uranium-plutonium carbide ( (U,Pu)C ).

Uranium carbide is also a popular target material for particle accelerators.^{[citation needed]}

Ammonia synthesis from nitrogen and hydrogen is sometimes accomplished in the presence of uranium carbide acting as a catalyst.^[4]

References

^ Ma, Benjamin. Nuclear Reactor Materials and Applications. Van Nostrand Reinhold Co, 1983, p. 167.
^ Also called diuranium tricarbide, it was reported by Austin, A. E. (1959-02-01). "Carbon positions in uranium carbides". Acta Crystallographica. 12 (2). International Union of Crystallography (IUCr): 159–161. Bibcode:1959AcCry..12..159A. doi:10.1107/s0365110x59000445. ISSN 0365-110X.
^ Uranium dicarbide was reported by Bowman, A. L.; Arnold, G. P.; Witteman, W. G.; Wallace, T. C.; Nereson, N. G. (1966-11-01). "The crystal structure of UC₂". Acta Crystallographica. 21 (5). International Union of Crystallography (IUCr): 670–671. Bibcode:1966AcCry..21..670B. doi:10.1107/s0365110x66003670. ISSN 0365-110X.
^ Hutchings, Graham J.; Heneghan, Catherine S.; Hudson, Ian D.; Taylor, Stuart H. (1996). "Uranium-oxide-based catalysts for the destruction of volatile chloro-organic compounds". Nature. 384 (6607). Springer Science and Business Media LLC: 341–343. Bibcode:1996Natur.384..341H. doi:10.1038/384341a0. ISSN 0028-0836. S2CID 4299921.