Name

Tellurium

Atomic Number

52

Refractive Index

1.000991

Phase At STP

Solid

Spectrum Image

Source

CAS Number

13494-80-9

CID Number

CID6327182

DOT Number

2811

RTECS Number

RTECSWY2625000

Mendeleev Number

102

Pettifor Number

92

Space Group Number

152

Glawe Number

94

Atomic Mass

127.603 Da

Uncertainty

0.03

X Position

16

Y Position

5

Period

5

Group

16

Block

p

Category

Metalloid

Geochemical

Semi-Volatile

Goldschmidt

Chalcophilic

Electrical Type

Semiconductor

Earth Crust

1e-9 g

Solar System

0.0000049 mole ratio to silicon

Meteorites

0.00021 %

Jmol

Molcas Gv

CPK

Empirical

140

Calculated

123

Van Der Waals

206

Bonding

206

Batsanov

210

Rahm

242

Dreiding

423

Uff

447

Mm3

244

Alvarez

199

Bragg

133

Covalent (Single Bound)

135

Covalent (Triple Bound)

121

Covalent (Cordero)

138

Covalent (Pyykko)

136

Covalent (Pyykko Double)

128

Covalent (Pyykko Triple)

121

Mendeleev

137

C12

160

Melting/Freeze (USE)

722.66 °K

Melting/Freeze (WEL)

722.66 °K

Melting/Freeze (CRC)

722.51 °K

Melting/Freeze (LNG)

722.8 °K

Boiling/Density (USE)

1261 °K

Boiling/Density (WEL)

1261 °K

Boiling/Density (CRC)

1261 °K

Boiling/Density (LNG)

1262.9 °K

Boiling/Density (Zhang)

1263 °K

Autoignition Point

613 °K

STP

6.24 kg/cm³

Solid (WEL)

6240 kg/cm³

Solid (CRC)

6240 kg/cm³

Solid (LNG)

6240 kg/cm³

Liquid (CR2)

5700 kg/cm³

Molar Volume

20.46 cm³/mol

Atomic Volume

20.5 cm³

Heat Of Fusion USE

17.91 kJ/mol

Heat Of Fusion CRC

17.49 kJ/mol

Heat Of Fusion LNG

17.49 kJ/mol

Heat Of Fusion WEL

17.5 kJ/mol

Evaporation USE

49.8 kJ/mol

Evaporation CRC

114.1 kJ/mol

Evaporation LNG

114.1 kJ/mol

Evaporation WEL

48 kJ/mol

Evaporation Zhang

114 kJ/mol

Molar Heat

25.73 J/molK

Heat Capacity USE

0.201 J/gK

Heat Capacity CRC

25.73 J/gK

Heat Capacity LNG

25.7 J/gK

Heat Capacity WEL

25.7 J/gK

Thermal Conductivity

14.3 W/m*K

Adiabatic Index

N/A

Extensional

2610 m/s

Order

Diamagnetic

Susceptibility

-3.9e-9 m3/kg

Shear Modulus

16 GPa

Bulk Modulus

65 GPa

Youngs Modulus

43 GPa

Mohs

2.25

Brinell

180–270

Observed/Predicted By

F.-J.M. from Reichenstein

Observed/Discovery Year

1782

Discovery Location

Isolated Sample By

H. Klaproth

Half Life

Stable

Lifetime

Stable

Neutron Mass Absorption

0.0013

Neutron Cross Section

5.4

Electron Affinity (eV)

1.970876

Electron Affinity (kJ/mol)

190.161

Electron Affinity (pauling)

2.1

Electron Affinity (allen)

12.76

Electron Affinity (ghosh)

0.2056992

Accepted

38

Uncertainty

4

C6 GB

471

C6 Coefficient

445

Constant Internal Default Radius

4.45

Constant

445.72, 445.72, 592.9

Strucutre

HEX

Angles

π/2, π/2, 2 π/3

Oxidation States

−2,−1,1,2,3,4,5,6

Electron Configuration

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p4

Quantum Number

a burden

Electron Configuration Semantic

[Kr] 4d10 5s2 5p4

Shells-0

2

Shells-1

8

Shells-2

18

Shells-3

18

Shells-4

6

Ionization Energies-0

869.3

Ionization Energies-1

1790

Ionization Energies-2

2698

Ionization Energies-3

3610

Ionization Energies-4

5668

Ionization Energies-5

6820

Ionization Energies-6

13200