Tellurium (Te)

Tellurium is the 52nd element in the periodic table and has a symbol of Te and atomic number of 52. It has an atomic weight of 127.60 and a mass number of 130. Tellurium has fifty-two protons and seventy-eight neutrons in its nucleus, and fifty-two electrons in five shells. It is located in group sixteen, period five and block p of the periodic table. Silvery metalloid element of group 16. Eight natural isotopes, nine radioactive isotopes. Used in semiconductors and to a degree in some steels. Chemistry is similar to Sulphur. Discovered in 1782 by Franz Miller.

Atomic Number	52
Atomic Weight	127.6
Mass Number	130

Group	16
Period	5
Block	p

Protons	52 p⁺
Neutrons	78 n⁰
Electrons	52 e^-

Properties

Physical Properties
Atomic Radius	140 pm 242 pm
Molar Volume	20.5 cm³/mol
Covalent Radius	136 pm 128 pm 121 pm 133 pm 138 pm
Metallic Radius	137 pm 160 pm
Ionic Radius	221 pm 52 pm 66 pm 97 pm 43 pm 56 pm
Crystal Radius	207 pm 66 pm 80 pm 111 pm 57 pm 70 pm
Van der Waals Radius	210 pm 206 pm 423 pm 206 pm 244 pm 447 pm
Density	6.232 g/cm³ 5,700 kg/m³
Energy
Proton Affinity
Electron Affinity	1.970876 eV/particle
Ionization Energy	9.00966 eV/particle 19 eV/particle 27.838 eV/particle 37.4155 eV/particle 59.25 eV/particle 69.1 eV/particle 124.201 eV/particle 143 eV/particle 167 eV/particle 191.1 eV/particle 215 eV/particle 245 eV/particle 272 eV/particle 299 eV/particle 328 eV/particle 354 eV/particle 461 eV/particle 491 eV/particle 522 eV/particle 555 eV/particle 599 eV/particle 633 eV/particle 709 eV/particle 746.12 eV/particle 1,304 eV/particle 1,377 eV/particle 1,455 eV/particle 1,538 eV/particle 1,618 eV/particle 1,707 eV/particle 1,803 eV/particle 1,889 eV/particle 1,979 eV/particle 2,066 eV/particle 2,309 eV/particle 2,386 eV/particle 2,472 eV/particle 2,552 eV/particle 2,700 eV/particle 2,788 eV/particle 2,954 eV/particle 3,041 eV/particle 7,022 eV/particle 7,243 eV/particle 7,485 eV/particle 7,714 eV/particle 8,240 eV/particle 8,499 eV/particle 8,821 eV/particle 9,040.83 eV/particle 37,196.52 eV/particle 38,177.56 eV/particle

Heat of Vaporization	49.8 kJ/mol
Heat of Fusion	17.91 kJ/mol
Heat of Formation	196.6 kJ/mol
Electrons
Electron Shells	2, 8, 18, 18, 6

Valence Electrons	6

Electron Configuration	[Kr] 4d¹⁰ 5s² 5p⁴

Oxidation States	-2, -1, 0, 1, 2, 3, 4, 5, 6
Electronegativity	12.76 eV/particle 0.2056992 2.1
Electrophilicity	2.141210947219293 eV/particle
Phases
Phase	Solid
Gas Phase
Boiling Point	1,261.15 K
Melting Point	722.66 K
Critical Pressure
Critical Temperature	2,329.15 K
Triple Point
Visual
Tellurium is a Silver. Te has a CPK of #ff1493, Jmol of #d47a00, and MOLCAS GV of #d47a00. The Refractive Index of Element 52 is 1.000991.
Color	Silver #ff1493 #d47a00 #d47a00
Appearance
Refractive Index	1.000991
Thermodynamic Properties
Thermal Conductivity	14.3 W/(m K)
Thermal Expansion
Molar Heat Capacity	25.73 J/(mol K)
Specific Heat Capacity	0.202 J/(g⋅K)
Heat Capacity Ratio (Adiabatic Index)
Electrical Properties
Type	Semiconductor
Electrical Conductivity	0.01 MS/m
Electrical Resistivity	0.0001 m Ω
Superconducting Point
Magnetism
Type	diamagnetic
Magnetic Susceptibility (Mass)	-0.0000000039 m³/Kg
Magnetic Susceptibility (Molar)	-0.000000000498 m³/mol
Magnetic Susceptibility (Volume)	-0.0000243
Magnetic Ordering
Curie Point
Neel Point
Structure
The Crystal Structure of Tellurium is HEX. The lattice constant of Te is 4.45 Å. The lattice angles of Element 52 are π/2, π/2, 2 π/3.
Crystal Structure	Simple Trigonal (HEX)
Lattice Constant	4.45 Å
Lattice Angles	π/2, π/2, 2 π/3
Mechanical Properties
Tellurium has a Brinell of 180 MPa, and Mohs hardness of 2.25 MPa. The Bulk Modulus of Te is 65 GPa. The Shear Modulus of Element 52 is 16 GPa. The Young Modulus of Tellurium (Te) is 43 GPa. The Speed of Sound of Tellurium is 2610 m/s.
Hardness	180 MPa 2.25 MPa
Bulk Modulus	65 GPa
Shear Modulus	16 GPa
Young Modulus	43 GPa
Poisson Ratio
Speed of Sound	2,610 m/s
Classification
The CAS Group of Tellurium is VIB. The IUPAC Group of Te is VIA. The Glawe Number of Element 52 is 94. The Mendeleev Number of Tellurium (Te) is 102. The Pettifor Number of Tellurium is 92. The Geochemical Class of Te is semi-volatile. The Goldschmidt Class of Element 52 is chalcophile.
Category	Metalloids, Metalloids
CAS Group	VIB
IUPAC Group	VIA
Glawe Number	94
Mendeleev Number	102
Pettifor Number	92
Geochemical Class	semi-volatile
Goldschmidt Class	chalcophile
Other
The Dipole Polarizability of Tellurium is 38 plus or minus 4 a₀. Te has a C6 Dispersion Coefficient (CD) of 445 a₀, and C6 Dispersion Coefficient (GB) of 471 a₀. The Allotropes of Element 52 is . The Neutron Cross Section of Tellurium (Te) is 5.4. The Neutron Mass Absorption of Tellurium is 0.0013. The Quantum Numbers of Te is 3P2. The Space Group of Element 52 is 152 (P3121).
Gas Basicity
Dipole Polarizability	38 ± 4 a₀
C6 Dispersion Coefficient	445 a₀ 471 a₀
Allotropes
Neutron Cross Section	5.4
Neutron Mass Absorption	0.0013
Quantum Numbers	3P2
Space Group	152 (P3121)

Isotopes of Tellurium

Stable Isotopes	8
Unstable Isotopes	34
Radioactive Isotopes	36

¹⁰⁴Te

Abundance	Radioactive ☢️
Relative Atomic Mass	103.946723408 ± 0.000340967 Da
Mass Number	104
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2018
Parity	+

¹⁰⁴Te Decay Modes

Decay Mode	Intensity
α (α emission)	100%

¹⁰⁵Te

Abundance	Radioactive ☢️
Relative Atomic Mass	104.943304516 ± 0.000322084 Da
Mass Number	105
G-Factor
Half Life	633 ± 66 ns
Spin	7/2
Quadrupole Moment
Discovery Year	2006
Parity	+

¹⁰⁵Te Decay Modes

Decay Mode	Intensity
α (α emission)	100%

¹⁰⁶Te

Abundance	Radioactive ☢️
Relative Atomic Mass	105.937498521 ± 0.000107934 Da
Mass Number	106
G-Factor	0
Half Life	78 ± 11 us
Spin	0
Quadrupole Moment	0
Discovery Year	1981
Parity	+

¹⁰⁶Te Decay Modes

Decay Mode	Intensity
α (α emission)	100%

¹⁰⁷Te

Abundance	Radioactive ☢️
Relative Atomic Mass	106.934882 ± 0.000108 Da
Mass Number	107
G-Factor
Half Life	3.22 ± 0.09 ms
Spin	5/2
Quadrupole Moment
Discovery Year	1979
Parity	+

¹⁰⁷Te Decay Modes

Decay Mode	Intensity
α (α emission)	70%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%
β⁺ p (β⁺-delayed proton emission)	%

¹⁰⁸Te

Abundance	Radioactive ☢️
Relative Atomic Mass	107.929380469 ± 0.000005808 Da
Mass Number	108
G-Factor	0
Half Life	2.1 ± 0.1 s
Spin	0
Quadrupole Moment	0
Discovery Year	1974
Parity	+

¹⁰⁸Te Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	51%
α (α emission)	49%
β⁺ p (β⁺-delayed proton emission)	2.4%
β⁺α (β⁺-delayed α emission)	0.065%

¹⁰⁹Te

Abundance	Radioactive ☢️
Relative Atomic Mass	108.927304532 ± 0.000004704 Da
Mass Number	109
G-Factor
Half Life	4.4 ± 0.2 s
Spin	5/2
Quadrupole Moment
Discovery Year	1967
Parity	+

¹⁰⁹Te Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	96.1%
α (α emission)	3.9%
β⁺ p (β⁺-delayed proton emission)	9.4%
β⁺α (β⁺-delayed α emission)	0.0049%

¹¹⁰Te

Abundance	Radioactive ☢️
Relative Atomic Mass	109.922458102 ± 0.000007058 Da
Mass Number	110
G-Factor	0
Half Life	18.6 ± 0.8 s
Spin	0
Quadrupole Moment	0
Discovery Year	1977
Parity	+

¹¹⁰Te Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	%

¹¹¹Te

Abundance	Radioactive ☢️
Relative Atomic Mass	110.921000587 ± 0.0000069 Da
Mass Number	111
G-Factor
Half Life	26.2 ± 0.6 s
Spin	5/2
Quadrupole Moment
Discovery Year	1967
Parity

¹¹¹Te Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	%

¹¹²Te

Abundance	Radioactive ☢️
Relative Atomic Mass	111.916727848 ± 0.000009 Da
Mass Number	112
G-Factor	0
Half Life	2 ± 0.2 m
Spin	0
Quadrupole Moment	0
Discovery Year	1976
Parity	+

¹¹²Te Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹¹³Te

Abundance	Radioactive ☢️
Relative Atomic Mass	112.915891 ± 0.00003 Da
Mass Number	113
G-Factor
Half Life	1.7 ± 0.2 m
Spin	7/2
Quadrupole Moment
Discovery Year	1974
Parity	+

¹¹³Te Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹¹⁴Te

Abundance	Radioactive ☢️
Relative Atomic Mass	113.91208782 ± 0.000026224 Da
Mass Number	114
G-Factor	0
Half Life	15.2 ± 0.7 m
Spin	0
Quadrupole Moment	0
Discovery Year	1968
Parity	+

¹¹⁴Te Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹¹⁵Te

Abundance	Radioactive ☢️
Relative Atomic Mass	114.911902 ± 0.00003 Da
Mass Number	115
G-Factor
Half Life	5.8 ± 0.2 m
Spin	7/2
Quadrupole Moment
Discovery Year	1961
Parity	+

¹¹⁵Te Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹¹⁶Te

Abundance	Radioactive ☢️
Relative Atomic Mass	115.908465558 ± 0.000025986 Da
Mass Number	116
G-Factor	0
Half Life	2.49 ± 0.04 h
Spin	0
Quadrupole Moment	0
Discovery Year	1958
Parity	+

¹¹⁶Te Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹¹⁷Te

Abundance	Radioactive ☢️
Relative Atomic Mass	116.908646227 ± 0.000014444 Da
Mass Number	117
G-Factor
Half Life	62 ± 2 m
Spin	1/2
Quadrupole Moment	0
Discovery Year	1958
Parity	+

¹¹⁷Te Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
ϵ (electron capture)	75%
e⁺ (positron emission)	25%

¹¹⁸Te

Abundance	Radioactive ☢️
Relative Atomic Mass	117.905860104 ± 0.000019652 Da
Mass Number	118
G-Factor	0
Half Life	6 ± 0.02 d
Spin	0
Quadrupole Moment	0
Discovery Year	1948
Parity	+

¹¹⁸Te Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	100%

¹¹⁹Te

Abundance	Radioactive ☢️
Relative Atomic Mass	118.906405699 ± 0.000007813 Da
Mass Number	119
G-Factor	0.5 ± 0.1
Half Life	16.05 ± 0.05 h
Spin	1/2
Quadrupole Moment	0
Discovery Year	1948
Parity	+

¹¹⁹Te Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
ϵ (electron capture)	97.94%
e⁺ (positron emission)	2.06%

¹²⁰Te

Abundance	0.09 ± 0.01
Relative Atomic Mass	119.904065779 ± 0.00000188 Da
Mass Number	120
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1936
Parity	+

¹²⁰Te Decay Modes

Decay Mode	Intensity
2β⁺ (double β⁺ decay)	%

¹²¹Te

Abundance	Radioactive ☢️
Relative Atomic Mass	120.904945065 ± 0.000027734 Da
Mass Number	121
G-Factor
Half Life	19.31 ± 0.07 d
Spin	1/2
Quadrupole Moment	0
Discovery Year	1939
Parity	+

¹²¹Te Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹²²Te

Abundance	2.55 ± 0.12
Relative Atomic Mass	121.903044708 ± 0.000001456 Da
Mass Number	122
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1932
Parity	+

¹²³Te

Abundance	0.89 ± 0.03
Relative Atomic Mass	122.904271022 ± 0.000001454 Da
Mass Number	123
G-Factor
Half Life
Spin	1/2
Quadrupole Moment	0
Discovery Year	1932
Parity	+

¹²³Te Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	100%

¹²⁴Te

Abundance	4.74 ± 0.14
Relative Atomic Mass	123.902818341 ± 0.000001451 Da
Mass Number	124
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1932
Parity	+

¹²⁵Te

Abundance	7.07 ± 0.15
Relative Atomic Mass	124.904431178 ± 0.000001451 Da
Mass Number	125
G-Factor
Half Life
Spin	1/2
Quadrupole Moment	0
Discovery Year	1931
Parity	+

¹²⁶Te

Abundance	8.84 ± 0.25
Relative Atomic Mass	125.903312144 ± 0.000001453 Da
Mass Number	126
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1924
Parity	+

¹²⁷Te

Abundance	Radioactive ☢️
Relative Atomic Mass	126.905226993 ± 0.000001465 Da
Mass Number	127
G-Factor	0.42333333333333 ± 0.0026666666666667
Half Life	9.35 ± 0.07 h
Spin	3/2
Quadrupole Moment
Discovery Year	1938
Parity	+

¹²⁷Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹²⁸Te

Abundance	Radioactive ☢️ 31.74 ± 0.08
Relative Atomic Mass	127.904461237 ± 0.000000758 Da
Mass Number	128
G-Factor	0
Half Life	2.25 ± 0.09 Yy
Spin	0
Quadrupole Moment	0
Discovery Year	1924
Parity	+

¹²⁸Te Decay Modes

Decay Mode	Intensity
2β⁻ (double β⁻ decay)	100%

¹²⁹Te

Abundance	Radioactive ☢️
Relative Atomic Mass	128.906596419 ± 0.000000763 Da
Mass Number	129
G-Factor	0.468 ± 0.0026666666666667
Half Life	69.6 ± 0.3 m
Spin	3/2
Quadrupole Moment	0.055 ± 0.013
Discovery Year	1939
Parity	+

¹²⁹Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹³⁰Te

Abundance	Radioactive ☢️ 34.08 ± 0.62
Relative Atomic Mass	129.906222745 ± 0.000000011 Da
Mass Number	130
G-Factor	0
Half Life	791 ± 21 Ey
Spin	0
Quadrupole Moment	0
Discovery Year	1924
Parity	+

¹³⁰Te Decay Modes

Decay Mode	Intensity
2β⁻ (double β⁻ decay)	100%

¹³¹Te

Abundance	Radioactive ☢️
Relative Atomic Mass	130.90852221 ± 0.000000065 Da
Mass Number	131
G-Factor	0.464 ± 0.006
Half Life	25 ± 0.1 m
Spin	3/2
Quadrupole Moment
Discovery Year	1939
Parity	+

¹³¹Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹³²Te

Abundance	Radioactive ☢️
Relative Atomic Mass	131.908546713 ± 0.000003742 Da
Mass Number	132
G-Factor	0
Half Life	3.204 ± 0.013 d
Spin	0
Quadrupole Moment	0
Discovery Year	1948
Parity	+

¹³²Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹³³Te

Abundance	Radioactive ☢️
Relative Atomic Mass	132.91096333 ± 0.000002218 Da
Mass Number	133
G-Factor	0.56666666666667 ± 0.013333333333333
Half Life	12.5 ± 0.3 m
Spin	3/2
Quadrupole Moment	0.23 ± 0.09
Discovery Year	1940
Parity	+

¹³³Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹³⁴Te

Abundance	Radioactive ☢️
Relative Atomic Mass	133.911396376 ± 0.000002948 Da
Mass Number	134
G-Factor	0
Half Life	41.8 ± 0.8 m
Spin	0
Quadrupole Moment	0
Discovery Year	1948
Parity	+

¹³⁴Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹³⁵Te

Abundance	Radioactive ☢️
Relative Atomic Mass	134.916554715 ± 0.000001848 Da
Mass Number	135
G-Factor	-0.19714285714286 ± 0.014285714285714
Half Life	19 ± 0.2 s
Spin	7/2
Quadrupole Moment	0.29 ± 0.09
Discovery Year	1969
Parity	-

¹³⁵Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹³⁶Te

Abundance	Radioactive ☢️
Relative Atomic Mass	135.92010118 ± 0.000002448 Da
Mass Number	136
G-Factor	0
Half Life	17.63 ± 0.09 s
Spin	0
Quadrupole Moment	0
Discovery Year	1974
Parity	+

¹³⁶Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	1.37%

¹³⁷Te

Abundance	Radioactive ☢️
Relative Atomic Mass	136.925599354 ± 0.000002254 Da
Mass Number	137
G-Factor
Half Life	2.49 ± 0.05 s
Spin	3/2
Quadrupole Moment
Discovery Year	1975
Parity	-

¹³⁷Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	2.94%

¹³⁸Te

Abundance	Radioactive ☢️
Relative Atomic Mass	137.929472452 ± 0.000004065 Da
Mass Number	138
G-Factor	0
Half Life	1.46 ± 0.25 s
Spin	0
Quadrupole Moment	0
Discovery Year	1975
Parity	+

¹³⁸Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	4.8%

¹³⁹Te

Abundance	Radioactive ☢️
Relative Atomic Mass	138.935367191 ± 0.0000038 Da
Mass Number	139
G-Factor
Half Life	724 ± 81 ms
Spin	5/2
Quadrupole Moment
Discovery Year	1994
Parity	-

¹³⁹Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	%

¹⁴⁰Te

Abundance	Radioactive ☢️
Relative Atomic Mass	139.939487057 ± 0.000015434 Da
Mass Number	140
G-Factor	0
Half Life	351 ± 5 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1994
Parity	+

¹⁴⁰Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	%

¹⁴¹Te

Abundance	Radioactive ☢️
Relative Atomic Mass	140.945604 ± 0.000429 Da
Mass Number	141
G-Factor
Half Life	193 ± 16 ms
Spin	5/2
Quadrupole Moment
Discovery Year	1994
Parity	-

¹⁴¹Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	%
2n (2-neutron emission)	%

¹⁴²Te

Abundance	Radioactive ☢️
Relative Atomic Mass	141.950027 ± 0.000537 Da
Mass Number	142
G-Factor	0
Half Life	147 ± 8 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1994
Parity	+

¹⁴²Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	%
2n (2-neutron emission)	%

¹⁴³Te

Abundance	Radioactive ☢️
Relative Atomic Mass	142.956489 ± 0.000537 Da
Mass Number	143
G-Factor
Half Life	120 ± 8 ms
Spin	7/2
Quadrupole Moment
Discovery Year	2010
Parity	+

¹⁴³Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	%
2n (2-neutron emission)	%

¹⁴⁴Te

Abundance	Radioactive ☢️
Relative Atomic Mass	143.961116 ± 0.000322 Da
Mass Number	144
G-Factor	0
Half Life	93 ± 60 ms
Spin	0
Quadrupole Moment	0
Discovery Year	2015
Parity	+

¹⁴⁴Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	%
2n (2-neutron emission)	%

¹⁴⁵Te

Abundance	Radioactive ☢️
Relative Atomic Mass	144.967783 ± 0.000322 Da
Mass Number	145
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2018
Parity	+

¹⁴⁵Te Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%
β⁻ n (β⁻-delayed neutron emission)	%
2n (2-neutron emission)	%

History

Tellurium was discovered in Transylvania in 1782 by Franz-Joseph Müller von Reichenstein in a mineral containing tellurium and gold. In 1789, another Hungarian scientist, Pál Kitaibel, also discovered the element independently in an ore from Deutsch-Pilsen which had been regarded as argentiferous molybdenite. In 1798, it was named by Martin Heinrich Klaproth who earlier isolated it from the mineral calaverite. From the Latin word tellus, earth

Discoverers	Franz Müller von Reichenstein
Discovery Location	Romania
Discovery Year	1782
Etymology (Name Origin)	Latin: tellus (earth).
Pronunciation	te-LOOR-i-em (English)

Tellurium and tellurium compounds are considered to be mildly toxic

In air, tellurium burns with a greenish-blue flames, forming the dioxide

Uses

The primary use of tellurium is in alloys, foremost in steel and copper to improve machinability. Tellurium is used as a basic ingredient in blasting caps, and is added to cast iron for chill control. It is used in vulcanizing rubber and in catalysts for petroleum cracking. Tellurium is used as a coloring agent in ceramics. Used to improve the machining quality of copper and stainless steel products and to color glass and ceramics. Also in thermoelectric devices. Some is used in the rubber industry and it is a basic ingredient in manufacturing blasting caps.

Sources

Obtained as a by-product of copper and lead refining.

Abundance
Abundance in Earth's crust	0.001 mg/kg
Abundance in Oceans
Abundance in Human Body
Abundance in Meteor	0.00021 %
Abundance in Sun
Abundance in Universe	0.0000009 %

Nuclear Screening Constants

1	s	1.0432
2	p	4.14
2	s	13.6688
3	d	14.1607
3	p	17.9911
3	s	18.0019
4	d	32.04
4	p	28.878
4	s	27.5916
5	p	41.1915
5	s	39.462

Tellurium on ChemicalAid

Australian Educational Vocabulary ID	scot/3582
BNCF Thesaurus ID	41689
Biblioteca Nacional de España ID	XX530277
Bibliothèque nationale de France ID	12138330x
Brockhaus Enzyklopädie online ID	te
CAB ID	266885
CAS Registry Number	13494-80-9
ChEBI ID	30452
ChemSpider ID	4885717
DSSTOX compound identifier	DTXCID7012119
DSSTox substance ID	DTXSID9032119
Den Store Danske ID	tellur
ECHA Substance Infocard ID	100.033.452
Encyclopædia Britannica Online ID	science/tellurium
Encyclopædia Universalis ID	tellure
Freebase ID	/m/025sk5w
GND ID	4184665-5
Gran Enciclopèdia Catalana ID	0145393
Great Russian Encyclopedia Online ID	4186445
HSDB ID	2532
Human Metabolome Database ID	HMDB0001854
ICSC ID	0986
InChI	InChI=1S/Te
InChIKey	PORWMNRCUJJQNO-UHFFFAOYSA-N
KBpedia ID	Tellurium
Library of Congress authority ID	sh85133642
MeSH descriptor ID	D013691
Mindat mineral ID	37792
NALT ID	55169
NDL Authority ID	00572907
NKCR AUT ID	ph126528
Namuwiki ID	텔루륨
National Library of Israel J9U ID	987007565705505171
OmegaWiki Defined Meaning	160178
Online PWN Encyclopedia ID	3986271
OpenAlex ID	C538181303
PSH ID	5809
PubChem CID	6327182
RxNorm ID	1311384
Store norske leksikon ID	tellur
Treccani ID	tellurio
UNII	NQA0O090ZJ
USGS Thesaurus ID	1589
Wolfram Language entity code	Entity["Mineral", "Tellurium"]
WordNet 3.1 Synset ID	14681407-n
YSO ID	22857
ZVG number	7520

Tellurium (Te)

Properties

Isotopes of Tellurium

104Te

104Te Decay Modes

105Te

105Te Decay Modes

106Te

106Te Decay Modes

107Te

107Te Decay Modes

108Te

108Te Decay Modes

109Te

109Te Decay Modes

110Te

110Te Decay Modes

111Te

111Te Decay Modes

112Te

112Te Decay Modes

113Te

113Te Decay Modes

114Te

114Te Decay Modes

115Te

115Te Decay Modes

116Te

116Te Decay Modes

117Te

117Te Decay Modes

118Te

118Te Decay Modes

119Te

119Te Decay Modes

120Te

120Te Decay Modes

121Te

121Te Decay Modes

122Te

123Te

123Te Decay Modes

124Te

125Te

126Te

127Te

127Te Decay Modes

128Te

128Te Decay Modes

129Te

129Te Decay Modes

130Te

130Te Decay Modes

131Te

131Te Decay Modes

132Te

132Te Decay Modes

133Te

133Te Decay Modes

134Te

134Te Decay Modes

135Te

135Te Decay Modes

136Te

136Te Decay Modes

137Te

137Te Decay Modes

138Te

138Te Decay Modes

139Te

139Te Decay Modes

140Te

140Te Decay Modes

141Te

141Te Decay Modes

142Te

142Te Decay Modes

143Te

143Te Decay Modes

144Te