Infobox uranium

	child table, as reused in {IB-U} Template:V
Main isotopes of Template:Infobox element/symbol-to-name
	{{infobox Template:Infobox element/symbol-to-name isotopes\|child=yes}}

Uranium, ₉₂U
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Uranium
Pronunciation	Template:Infobox element/pronunciation
Allotropes	Template:Infobox element/symbol-to-allotropes
Appearance	silvery gray metallic; corrodes to a spalling black oxide coat in air
Mass number	Template:Infobox element/symbol-to-most-stable-isotope
Uranium in the periodic table
	Template:Infobox element/periodic table
Atomic number (Z)	92
Group	Template:Infobox element/symbol-to-group
Period	Template:Infobox element/symbol-to-period
Block	Template:Infobox element/block format
Electron configuration	Template:Infobox element/symbol-to-electron-configuration
Electrons per shell	2, 8, 18, 32, 21, 9, 2
Physical properties
Phase at STP	Template:Infobox element/symbol-to-phase
Melting point	1405.3 K (1132.2 °C, 2070 °F)
Boiling point	4404 K (4131 °C, 7468 °F)
Density (at 20° C)	19.050 g/cm3
when liquid (at m.p.)	17.3 g/cm3
Heat of fusion	9.14 kJ/mol
Heat of vaporization	417.1 kJ/mol
Molar heat capacity	27.665 J/(mol·K)
	Vapor pressureTemplate:Infobox element/vapor pressure table
Atomic properties
Oxidation states	Template:Element-symbol-to-oxidation-state-data
Electronegativity	Pauling scale: 1.38
Ionization energies	1st: 597.6 kJ/mol ; 2nd: 1420 kJ/mol ; ;
Atomic radius	empirical: 156 pm
Covalent radius	196±7 pm
Van der Waals radius	186 pm
	Template:Infobox element/spectral lines
Other properties
Natural occurrence	Template:Infobox element/symbol-to-occurrence
Crystal structure	Template:Infobox element/crystal structure (oS4)
Lattice constants	Template:Infobox element/crystal structurea = 285.35 pm; b = 586.97 pm; c = 495.52 pm (at 20 °C)
Thermal expansion	15.46×10−6/K (at 20 °C)
Thermal conductivity	27.5 W/(m⋅K)
Electrical resistivity	0.280 µΩ⋅m (at 0 °C)
Magnetic ordering	paramagnetic
Young's modulus	208 GPa
Shear modulus	111 GPa
Bulk modulus	100 GPa
Speed of sound thin rod	3155 m/s (at 20 °C)
Poisson ratio	0.23
Vickers hardness	1960–2500 MPa
Brinell hardness	2350–3850 MPa
CAS Number	7440-61-1
History
Naming	after planet Uranus, itself named after Greek god of the sky Uranus
Discovery	Martin Heinrich Klaproth (1789)
First isolation	Eugène-Melchior Péligot (1841)
Symbol	Template:Infobox element/symbol-to-symbol-etymology
Isotopes of uranium Template:V
	Template:infobox uranium isotopes does not exist
	Category: Uranium; view; talk; edit; \| references

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Notes

↑ The thermal expansion is anisotropic: the coefficients for each crystal axis (at 20 °C) are α_a = 25.27×10⁻⁶/K, α_b = 0.76×10⁻⁶/K, α_c = 20.35×10⁻⁶/K, and α_average = α_volume/3 = 15.46×10⁻⁶/K.

References

↑ ^1.0 ^1.1 Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements. Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9.

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[2] The thermal expansion is anisotropic: the coefficients for each crystal axis (at 20 °C) are α_a = 25.27×10⁻⁶/K, α_b = 0.76×10⁻⁶/K, α_c = 20.35×10⁻⁶/K, and α_average = α_volume/3 = 15.46×10⁻⁶/K.

[Arblaster_2018-1] 1.0 ^1.1 Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements. Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9.

[1]

[lower-alpha 1]

Template:Infobox uranium

Notes

References