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CBMM
CBMM - English

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Property

Value

Atomic number

41

Atomic radius, nm

2.08

Atomic volume cm3/mol

10.83

Atomic weight

92.906

Boiling point, K

5,017

Bonding radius, nm

1.34

 

Coefficient of thermal expansion: ºC-1

@ 500ºC

7.47 x 10-6

@ 700ºC

7.63 x 10-6

@ 900ºC

7.79 x 10-6

@ 1000ºC

7.88 x 10-6

 

Crystal structure

Body centered cubic

Density g/cm3

8.57

 

Electrical resistivity: ohm-cm

17 x 106

@ 899ºC

50 x 106

 

Electron configuration

[Kr] 424 5s1

Electron emission A-cm2K2

37

Electronegativity

-1.6

 

Elongation (5 cm)

@ 20ºC

25

@ 799ºC

30

@ 1199ºC

45

 

Total emissivity

@ 1500ºC

0.19

@ 2000ºC

0.24

 

Hardness (annealed)

90 DPH, 81 BHN

Heat of fusion, kJ/mol

26.94

Heat of vaporization, kJ/mol

26.4

Ionization potential, V

6.8

Lattice constant @ 20ºC: nm

0.3294

Lattice type

bcc

Magnetic susceptibility: CGS

2.28 x 10-6

Melting point K

2,741

Oxidation states

+3,+5

Poisson's ratio

0.38

Positive ion emission eV

5.5

Recrystallization temperature ºC

900-1200

Refractive index

899-1204

 

Radiation, total n: W/cm2

1.80

@ 1880ºC

22

@ 1980ºC

30

 

Specific heat J/gK

0.26

Spectral emissivity: @ 0.667 m

0.374

Stress relieving temperature ºC

760-802

 

Tensile strength, typical: MPa

@ 20ºC

172

@ 799ºC

103

@ 1199ºC

34

 

Thermal conductivity J/m-sec-deg

53.7

@ 302ºC

53.6

@ 799ºC

57.1

 

Thermal neutron cross-section: barns

1.1

Thermionic work function eV

4.01

 

Yield strength, typical: MPa

@ 20ºC

103

@ 799ºC

69

@ 1199ºC

14

 

Young's modulus: GPa

@ 20ºC

98.5

@ 799ºC

82.7

@ 1199ºC

75.8

@ 1788ºC

51.7