ChemicalBook CAS DataBase List 1344-57-6

1344-57-6

Name	URANIUM(IV) OXIDE
CAS	1344-57-6
EINECS(EC#)	215-700-3
Molecular Formula	O2U
MDL Number	MFCD00049692
Molecular Weight	270.03
MOL File	1344-57-6.mol

Synonyms

UO2 Uranyl(VI) dioxouranium diketouranium uranous oxide URANIUM OXIDE Uranium(Ⅳ)oxide URANIUM DIOXIDE URANIUM(IV) OXIDE uraniumoxide(uo2) Uranium oxide(IV) Uranium(IV)dioxide Uranium oxide (UO2) Uranium(4) oxide, red URANIUM (IV) OXIDE 99.8% URANIUM OXIDE BROWN-BLACK Nuclear reference material 238UO2 A Nuclear reference material 238UO2 B Uranium(IV) oxide: (Uranium black oxide) Uranium(IV) oxide nuclear reference material, Uranium(IV) oxide

Chemical Properties

Melting point

2500°C

density

10,96 g/cm³

solubility

insoluble in H2O, dilute acid solutions; soluble in conc acid solutions

form

brown cubic crystals

color

brown cubic crystals, crystalline

Resistivity

3.8 × 10*10 (ρ/μΩ.cm)

Water Solubility

insoluble H2O, dilute acids; soluble conc acids [MER06]

Specific Heat Capacity

Cp(crystal):0.235531J/(g·K);Cp(gas):0.190351J/(g·K),at 25℃

Thermal Conductivity

10.46 W/(m·K) (crystal)

Crystal Structure

Cubic

crystal system

Cube

Space group

Fm3m

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.54581	0.54581	0.54581	90	90	90	0.1626

EPA Substance Registry System

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

Safety Data

RIDADR	2912
TSCA	TSCA listed
HazardClass	7
PackingGroup	III
HS Code	28441000

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1344-57-6

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