Uranium trioxide | SSHADE

Solid phase

Official name: Uranium trioxide

Name and identifiers

Secondary names: Uranium(VI) oxide
CAS number: 1344-58-7

Family: covalent network solid
Class: tridimentional covalent network solid
Compound type: oxide

Chemical composition

Formula: $\delta UO_3$
Chemical formula: UO3
Elemental formula: U O3
Isotope mixture type: terrestrial abundance

8.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$U$	Uranium	element	1	0.25	1	constituent element	main
	$O$	Oxygen	element	3	0.75	1	constituent element	main

Chemical functions and bonds

Chemical bonds

	Bond	Number
	$\geq >U-O-$	6

Class: tridimensional covalent networks (11)
Type: two non-metal (or one metalloid and one non-metal) atoms tridimensional networks (Ceramics) (11.03)

Crystallography

Phase name: $\gamma-UO_3$
Phase type: crystalline
Crystal system: isometric (cubic)
Crystal class: hexoctahedral
Crystal class symbol: m-3m (Oh)
Crystal spacegroup: Pm-3m

Physical properties

Molar mass: 286.29 $g/mol$
Density: 6.72 $g/cm^3$

Thermodynamical properties

State NTP

solid

Phase transitions

Phase transition type	Other phases	Temperature - Pressure
solid-liquid decomposition		200-650°C

Optical properties

Refringence type: isotropic
Color: jaune-orange

Links and Publications

Links

Wikipedia