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Indium Thallium Comparison

Indium
Thallium
Thallium Indium comparison


Periodic Table
Symbol
In  
Tl  
Group Number
13  
5
13  
5
Period Number
5  
6  
Block
p block  
p block  
Element Family
Post-​Transition  
Post-​Transition  
CAS Number
7440746  
17
7440280  
99+
Space Group Name
I4/mmm  
P63/mmc  
Space Group Number
139.00  
11
194.00  
7
Facts
Interesting Facts
  • Luster of Indium is bright in nature.
  • Reich and richer were looking for thallium in zinc metal and they discovered Indium metal.
  
  • Compounds of Thallium metal are highly Toxic.
  • Thallium metal is being suspected as a human carcinogen.
  
Sources
Mining, Ores of metals  
Found As a By-product, Ores of metals, Ores of Minerals  
History
  
  
Who Discovered
Ferdinand Reich and Hieronymous Theodor Richter  
William Crookes  
Discovery
In 1863  
In 1861  
Abundance
  
  
Abundance In Universe
0.00 %  
29
0.00 %  
33
Abundance In Sun
0.00 %  
23
0.00 %  
26
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
0.00 %  
99+
0.00 %  
34
Abundance In Humans
0.00 %  
16
0.00 %  
24
Uses
Uses & Benefits
  • It is used to produce indium tin oxide (ITO), it is used in manufacturing touch screens, flat screen TVs and solar panels.
  • Its nitride, phosphide and antimonide are used in transistors and microchips.
  
  • Thallium is a toxic metal and hence it has limited uses. Thallium metal is mostly used for producing photoelectric cells.
  • In thermometer’s mercury alloy has 8% of thallium, as it has a melting point lower than 20°C.
  
Industrial Uses
Aerospace Industry, Automobile Industry  
Chemical Industry  
Medical Uses
Medical Research  
Medical Research  
Other Uses
Alloys, In Nuclear Reactors  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
Highly Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
38
Physical
Melting Point
156.61 °C  
99+
303.50 °C  
99+
Boiling Point
2,000.00 °C  
99+
1,457.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery Gray  
Silvery White  
Luster
Lustrous  
-  
Hardness
  
  
Mohs Hardness
1.20  
21
1.20  
21
Brinell Hardness
8.80 MPa  
99+
26.50 MPa  
99+
Vickers Hardness
0.01 MPa  
99+
120.00 MPa  
99+
Speed of Sound
1,215.00 m/s  
99+
818.00 m/s  
99+
Optical Properties
  
  
Refractive Index
3.41  
1
1.90  
18
Reflectivity
83.00 %  
6
8.00 %  
37
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
In  
Tl  
Isotopes
  
  
Known Isotopes
35  
4
32  
7
Electronegativity
  
  
Pauling Electronegativity
1.78  
17
1.62  
22
Sanderson Electronegativity
2.14  
9
2.25  
6
Allred Rochow Electronegativity
1.49  
14
1.44  
18
Mulliken-Jaffe Electronegativity
1.76  
18
1.96  
11
Allen Electronegativity
1.66  
21
1.79  
16
Electropositivity
  
  
Pauling Electropositivity
2.22  
38
2.38  
33
Ionization Energies
  
  
1st Energy Level
558.30 kJ/mol  
99+
589.40 kJ/mol  
99+
2nd Energy Level
1,820.70 kJ/mol  
19
1,971.00 kJ/mol  
14
3rd Energy Level
2,704.00 kJ/mol  
40
2,878.00 kJ/mol  
32
4th Energy Level
5,210.00 kJ/mol  
26
5,890.00 kJ/mol  
17
5th Energy Level
5,580.00 kJ/mol  
99+
5,890.00 kJ/mol  
99+
6th Energy Level
5,580.00 kJ/mol  
99+
5,890.00 kJ/mol  
99+
7th Energy level
5,580.00 kJ/mol  
99+
5,890.00 kJ/mol  
99+
8th Energy Level
5,580.00 kJ/mol  
99+
5,890.00 kJ/mol  
99+
9th Energy Level
5,580.00 kJ/mol  
99+
5,890.00 kJ/mol  
99+
10th Energy Level
5,580.00 kJ/mol  
99+
5,890.00 kJ/mol  
99+
11th Energy Level
5,580.00 kJ/mol  
99+
5,890.00 kJ/mol  
99+
12th Energy Level
5,580.00 kJ/mol  
99+
5,890.00 kJ/mol  
99+
13th Energy Level
5,580.00 kJ/mol  
99+
5,890.00 kJ/mol  
99+
14th Energy Level
558.30 kJ/mol  
99+
5,890.00 kJ/mol  
37
15th Energy Level
55,800.00 kJ/mol  
99+
58,900.00 kJ/mol  
99+
16th Energy Level
558.30 kJ/mol  
99+
58,900.00 kJ/mol  
38
17th Energy Level
558.30 kJ/mol  
99+
589.40 kJ/mol  
99+
18th Energy Level
5,580.00 kJ/mol  
99+
5,890.00 kJ/mol  
99+
19th Energy Level
558.30 kJ/mol  
99+
589.40 kJ/mol  
99+
20th Energy Level
558.00 kJ/mol  
99+
589.00 kJ/mol  
99+
21st Energy Level
558.30 kJ/mol  
99+
589.40 kJ/mol  
99+
22nd Energy Level
558.00 kJ/mol  
99+
589.00 kJ/mol  
99+
23rd Energy Level
5,581.00 kJ/mol  
24
589.40 kJ/mol  
99+
24th Energy Level
558.30 kJ/mol  
99+
589.40 kJ/mol  
99+
25th Energy Level
558.00 kJ/mol  
99+
589.40 kJ/mol  
99+
26th Energy Level
558.30 kJ/mol  
99+
589.40 kJ/mol  
99+
27th Energy Level
558.30 kJ/mol  
99+
589.40 kJ/mol  
99+
28th Energy Level
558.30 kJ/mol  
99+
589.40 kJ/mol  
99+
29th Energy Level
558.30 kJ/mol  
99+
589.40 kJ/mol  
99+
30th Energy Level
558.00 kJ/mol  
99+
589.40 kJ/mol  
99+
Electrochemical Equivalent
1.43 g/amp-hr  
99+
7.63 g/amp-hr  
2
Electron Work Function
4.12 eV  
31
3.84 eV  
39
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
49  
99+
81  
35
Electron Configuration
[Kr] 4d10 5s2 5p1  
[Xe] 4f14 5d10 6s2 6p1  
Crystal Structure
Tetragonal (TETR)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
TETR-Crystal-Structure-of-Indium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
49  
99+
81  
35
Number of Neutrons
66  
99+
123  
21
Number of Electrons
49  
99+
81  
35
Radius of an Atom
  
  
Atomic Radius
167.00 pm  
26
170.00 pm  
24
Covalent Radius
142.00 pm  
99+
145.00 pm  
99+
Van der Waals Radius
193.00 pm  
38
196.00 pm  
37
Atomic Weight
114.82 amu  
99+
204.38 amu  
31
Atomic Volume
15.70 cm3/mol  
99+
17.20 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Cadmium
  
Mercury
  
Next Element
Tin
  
Lead
  
Valence Electron Potential
54.00 (-eV)  
26
9.60 (-eV)  
99+
Lattice Constant
325.23 pm  
99+
345.66 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.56  
99+
1.60  
23
Mechanical
Density
  
  
Density At Room Temperature
7.31 g/cm3  
99+
11.85 g/cm3  
33
Density When Liquid (at m.p.)
7.02 g/cm3  
99+
11.22 g/cm3  
33
Tensile Strength
2.50 MPa  
99+
47.00 MPa  
39
Viscosity
0.00  
25
0.00  
22
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.01 (Pa)  
11
16.90 (Pa)  
5
Vapor Pressure at 2000 K
0.00 (Pa)  
24
0.00 (Pa)  
38
Elasticity properties
  
  
Shear Modulus
18.00 GPa  
99+
2.80 GPa  
99+
Bulk Modulus
46.90 GPa  
27
43.00 GPa  
33
Young's Modulus
11.00 GPa  
99+
8.00 GPa  
99+
Poisson Ratio
0.44  
3
0.45  
2
Other Mechanical Properties
Ductile, Malleable  
Ductile, Sectile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
7.31  
99+
11.85  
35
Magnetic Ordering
Diamagnetic  
Diamagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
17
Susceptibility
0.00  
34
0.00  
28
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
83.70 nΩ·m  
34
0.18 nΩ·m  
99+
Electrical Conductivity
0.12 106/cm Ω  
20
0.06 106/cm Ω  
37
Electron Affinity
28.90 kJ/mol  
37
19.20 kJ/mol  
38
Thermal
Specific Heat
0.23 J/(kg K)  
27
0.13 J/(kg K)  
40
Molar Heat Capacity
26.74 J/mol·K  
32
26.32 J/mol·K  
37
Thermal Conductivity
81.80 W/m·K  
21
46.10 W/m·K  
33
Critical Temperature
429.75 K  
99+
577.00 K  
99+
Thermal Expansion
32.10 µm/(m·K)  
9
29.90 µm/(m·K)  
12
Enthalpy
  
  
Enthalpy of Vaporization
226.40 kJ/mol  
99+
162.10 kJ/mol  
99+
Enthalpy of Fusion
3.28 kJ/mol  
99+
4.27 kJ/mol  
99+
Enthalpy of Atomization
242.70 kJ/mol  
99+
179.90 kJ/mol  
99+
Standard Molar Entropy
57.80 J/mol.K  
27
64.20 J/mol.K  
20
Summary >>
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