Plutonium(IV) oxide

Plutonium(IV) oxide
Names
	IUPAC name Plutonium(IV) oxide
	Systematic IUPAC name Plutonium(4+) oxide
	Other names Plutonium dioxide
Identifiers
CAS Number	12059-95-9 ;
3D model (JSmol)	Interactive image;
ChemSpider	10617028 ;
ECHA InfoCard	100.031.840
EC Number	235-037-3;
PubChem CID	9795444;
CompTox Dashboard (EPA)	DTXSID30894111 ;
	InChI InChI=1S/2O.Pu/q2*-2;+4 Key: FLDALJIYKQCYHH-UHFFFAOYSA-N ;
	SMILES [O-2].[O-2].[Pu+4];
Properties
Chemical formula	O2Pu
Molar mass	276 g·mol−1
Appearance	Dark yellow crystals
Density	11.5 g cm−3
Melting point	2,744 °C (4,971 °F; 3,017 K)
Boiling point	2,800 °C (5,070 °F; 3,070 K)
Structure
Crystal structure	Fluorite (cubic), cF12
Space group	Fm3m, No. 225
Lattice constant	a = 539.5 pm
Coordination geometry	Tetrahedral (O2−); cubic (PuIV)
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Radioactive
NFPA 704 (fire diamond)	4 0 0
Flash point	non-flammable
Related compounds
Other cations	Uranium(IV) oxide; Neptunium(IV) oxide; Americium(IV) oxide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Plutonium(IV) oxide, or plutonia, is a chemical compound with the formula Pu O₂. This high melting-point solid is a principal compound of plutonium. It can vary in color from yellow to olive green, depending on the particle size, temperature and method of production.^[2]

^ Christine Guéneau; Alain Chartier; Paul Fossati; Laurent Van Brutzel; Philippe Martin (2020). "Thermodynamic and Thermophysical Properties of the Actinide Oxides". Comprehensive Nuclear Materials 2nd Ed. 7: 111–154. doi:10.1016/B978-0-12-803581-8.11786-2. ISBN 9780081028667.
^ "Nitric acid processing". Los Alamos Laboratory.

[cry-1] Christine Guéneau; Alain Chartier; Paul Fossati; Laurent Van Brutzel; Philippe Martin (2020). "Thermodynamic and Thermophysical Properties of the Actinide Oxides". Comprehensive Nuclear Materials 2nd Ed. 7: 111–154. doi:10.1016/B978-0-12-803581-8.11786-2. ISBN 9780081028667.

[2] "Nitric acid processing". Los Alamos Laboratory.

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