Uranium Properties

Uranium

Physical

Melting Point

1,132.00 °C 39

Boiling Point

3,818.00 °C 16

Hardness

Mohs Hardness

6.00 6

Brinell Hardness

2,350.00 MPa 2

Vickers Hardness

1,960.00 MPa 2

Optical Properties

Refractive Index

Not Available 0

Reflectivity

Not Available 0

Speed of Sound

3,155.00 m/s 25

Allotropes

No 0

α Allotropes

Not Available 0

β Allotropes

Not Available 0

γ Allotropes

Not Available 0

Chemical

Chemical Formula

U 0

Isotopes

Known Isotopes

25 14

Electronegativity

Pauling Electronegativity

1.38 28

Sanderson Electronegativity

Not Available 0

Allred Rochow Electronegativity

1.22 26

Mulliken-Jaffe Electronegativity

Not Available 0

Allen Electronegativity

Not Available 0

Electropositivity

Pauling Electropositivity

2.62 26

Ionization Energies

1st Energy Level

597.60 kJ/mol 54

2nd Energy Level

1,420.00 kJ/mol 46

3rd Energy Level

1,900.00 kJ/mol 79

Electrochemical Equivalent

1.48 g/amp-hr 46

Electron Work Function

3.63 eV 30

Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity 0

Mechanical

Density

Density At Room Temperature

19.10 g/cm³ 17

Density When Liquid (at m.p.)

17.30 g/cm3 7

Vapor Pressure

Vapor Pressure at 1000 K

Not Available 0

Vapor Pressure at 2000 K

0.01 (Pa) 20

Tensile Strength

Not Available 0

Viscosity

Not Available 0

Elasticity properties

Shear Modulus

111.00 GPa 10

Bulk Modulus

100.00 GPa 16

Young's Modulus

208.00 GPa 10

Poisson Ratio

0.23 30

Other Mechanical Properties

Ductile, Malleable 0

Periodic Table

Symbol

U 0

Group Number

0 18

Period Number

7 1

Block

f block 0

Element Family

Actinide 0

Atomic

Atomic Number

92 26

Atomic Weight

238.03 amu 21

Atomic Volume

12.59 cm3/mol 40

Electron Configuration

[Rn] 5f³ 6d¹ 7s² 0

Valence Electron Potential

170.00 (-eV) 4

Atom

Number of Protons

92 26

Number of Neutrons

146 13

Number of Electrons

92 26

Crystal Structure

Orthorhombic (ORTH) 0

Crystal Lattice

ORTH-Crystal-Structure-of-Uranium.jpg#100 0

Radius of an Atom

Atomic Radius

156.00 pm 29

Covalent Radius

196.00 pm 14

Van der Waals Radius

186.00 pm 33

Lattice Constant

295.08 pm 61

Lattice Angles

π/2, π/2, π/2 0

Lattice C/A Ratio

Not Available 0

Adjacent Atomic Numbers

Next Element

54 0

Previous Element

85 0

Magnetic

Electrical Properties

Resistivity

0.28 nΩ·m 68

Electrical Conductivity

0.04 10⁶/cm Ω 37

Electron Affinity

Not Available 0

Electrical Property

Poor Conductor 0

Magnetic Characteristics

Specific Gravity

18.80 10

Magnetic Ordering

Paramagnetic 0

Permeability

Not Available 0

Susceptibility

Not Available 0

Thermal

Specific Heat

0.12 J/(kg K) 40

Thermal Conductivity

27.50 W/m·K 40

Critical Temperature

Not Available 0

Molar Heat Capacity

27.67 J/mol·K 15

Thermal Expansion

13.90 µm/(m·K) 27

Standard Molar Entropy

50.20 J/mol.K 31

Enthalpy

Enthalpy of Vaporization

477.00 kJ/mol 13

Enthalpy of Fusion

15.48 kJ/mol 19

Enthalpy of Atomization

489.50 kJ/mol 14

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Uranium Properties

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