Tellurium

Symbol TeAtomic number 52
Atomic mass
127.6
 Thermal conductivity
0.0235
Atomic radius
1.42
 Covalent radius
1.36
Density
6.24
 Atomic volume
20.5
Melting point
722.65
 Oxidation states
-2,4,6
Boiling point
990
 Stable isotopes
8
Heat of vapor.
52.55
 Electronegativity
2.1
Heat of fusion
17.49
 First ionization
9.009
Specific heat
0.20
 Electrical conduct.
...
Electron configuration
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Tellurium

Tellurium is a semiconductor with electrical conductivity about two orders of magnitude lower than the metals. Its chemistry is similar to that of sulfur, except that it is more metallic in character.

Tellurium is found in the mineral nagyagite, a sulfide, along with lead, iron, antimony, and gold. Tellurium combines with gold to form krennerite and calaverite, both with the empirical formula AuTe2. These two minerals are said to be dimorphs of each other. Silver bonds to tellurium in the mineral hessite, Ag2Te.

This sample of tellurium is displayed in the Smithsonian Museum of Natural History. The sample is about 6x4 cm and is from the De La Mar mine, Delamar, Nevada.

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Tellurium Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
52
120
119.904047
111.6642
1017.3
0
0.00096
stable
...
...
52
122
121.903050
113.5263
1034.3
0
0.026
stable
...
...
52
123
122.904271
114.4590
1041.3
1/2
0.00908
1.3e13y
EC
0.052
52
124
123.902823
115.3891
1050.7
0
0.04816
stable
...
...
52
125
124.904433
116.3221
1057.3
1/2
0.0714
stable
...
...
52
126
125.903314
117.2526
1066.4
0
0.1895
stable
...
...
52
128
127.904463
119.1166
1081.5
0
0.3169
stable
...
...
52
130
129.906229
120.9813
1096.0
0
0.338
2.5e21y
2b-
2.53
Atomic data
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