Zirconium Properties

Zirconium

Physical

Melting Point

1,852.00 °C 15

Boiling Point

4,377.00 °C 11

Hardness

Mohs Hardness

5.00 8

Brinell Hardness

638.00 MPa 19

Vickers Hardness

820.00 MPa 15

Optical Properties

Refractive Index

Not Available 0

Reflectivity

Not Available 0

Speed of Sound

3,800.00 m/s 20

Allotropes

No 0

α Allotropes

Not Available 0

β Allotropes

Not Available 0

γ Allotropes

Not Available 0

Chemical

Chemical Formula

Zr 0

Isotopes

Known Isotopes

24 15

Electronegativity

Pauling Electronegativity

1.33 30

Sanderson Electronegativity

0.90 25

Allred Rochow Electronegativity

1.22 26

Mulliken-Jaffe Electronegativity

Not Available 0

Allen Electronegativity

1.32 34

Electropositivity

Pauling Electropositivity

2.67 24

Ionization Energies

1st Energy Level

640.10 kJ/mol 44

2nd Energy Level

1,270.00 kJ/mol 54

3rd Energy Level

2,218.00 kJ/mol 62

Electrochemical Equivalent

0.85 g/amp-hr 63

Electron Work Function

4.05 eV 26

Other Chemical Properties

Anti Corrosion, Flammable, Ionization, Radioactive Isotopes, Solubility 0

Mechanical

Density

Density At Room Temperature

6.52 g/cm³ 64

Density When Liquid (at m.p.)

5.80 g/cm3 45

Vapor Pressure

Vapor Pressure at 1000 K

Not Available 0

Vapor Pressure at 2000 K

0.00 (Pa) 21

Tensile Strength

330.00 MPa 12

Viscosity

Not Available 0

Elasticity properties

Shear Modulus

33.00 GPa 20

Bulk Modulus

91.10 GPa 17

Young's Modulus

88.00 GPa 22

Poisson Ratio

0.34 10

Other Mechanical Properties

Ductile, Malleable 0

Periodic Table

Symbol

Zr 0

Group Number

4 14

Period Number

5 3

Block

d block 0

Element Family

Transition Metal 0

Atomic

Atomic Number

40 72

Atomic Weight

91.22 amu 66

Atomic Volume

14.10 cm3/mol 36

Electron Configuration

[Kr] 4d² 5s² 0

Valence Electron Potential

80.00 (-eV) 18

Atom

Number of Protons

40 71

Number of Neutrons

51 54

Number of Electrons

40 71

Crystal Structure

Hexagonal Close Packed (HCP) 0

Crystal Lattice

HCP-Crystal-Structure-of-Zirconium.jpg#100 0

Radius of an Atom

Atomic Radius

160.00 pm 27

Covalent Radius

175.00 pm 23

Van der Waals Radius

200.00 pm 28

Lattice Constant

323.20 pm 53

Lattice Angles

π/2, π/2, 2 π/3 0

Lattice C/A Ratio

1.59 8

Adjacent Atomic Numbers

Next Element

62 0

Previous Element

59 0

Magnetic

Electrical Properties

Resistivity

421.00 nΩ·m 11

Electrical Conductivity

0.02 10⁶/cm Ω 41

Electron Affinity

41.10 kJ/mol 27

Electrical Property

Conductor 0

Magnetic Characteristics

Specific Gravity

6.51 51

Magnetic Ordering

Paramagnetic 0

Permeability

Not Available 0

Susceptibility

Not Available 0

Thermal

Specific Heat

0.27 J/(kg K) 19

Thermal Conductivity

22.60 W/m·K 42

Critical Temperature

Not Available 0

Molar Heat Capacity

25.36 J/mol·K 41

Thermal Expansion

5.70 µm/(m·K) 55

Standard Molar Entropy

39.00 J/mol.K 39

Enthalpy

Enthalpy of Vaporization

581.60 kJ/mol 9

Enthalpy of Fusion

20.90 kJ/mol 11

Enthalpy of Atomization

598.00 kJ/mol 10

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