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Thorium Iridium Comparison

Thorium
Iridium
Iridium Thorium comparison


Periodic Table
Symbol
Th  
Ir  
Group Number
0  
18
9  
9
Period Number
7  
6  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440326  
99+
7439885  
99+
Space Group Name
P63/mmc  
Fm_ 3m  
Space Group Number
194.00  
7
225.00  
3
Facts
Interesting Facts
  • Thorium metal is used as an alternate option over Uranium for nuclear fuel.
  • Thorium metals appearance (silvery white, soft) is somewhat similar to Lead metal.
  
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  
Sources
Found in Minerals, Mining  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Jöns Jakob Berzelius  
Smithson Tennant  
Discovery
In 1829  
In 1803  
Abundance
  
  
Abundance In Universe
0.00 %  
10
0.00 %  
23
Abundance In Sun
0.00 %  
9
0.00 %  
25
Abundance In Meteorites
0.05 %  
11
0.00 %  
29
Abundance In Earth's Crust
0.66 %  
7
0.00 %  
99+
Abundance In Oceans
0.00 %  
15
-  
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Thorium metal is used as an allying agent for Magnesium, It imparts greater strength and resistance to temperature.
  • compound of this metal Thorium oxide is used as an industrial catalyst.
  
  • Iridium has an anti corrosion properties and it is used in special alloy with Osmium metal and that alloy is used in pen tips and compass bearings.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry  
Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
Dentistry, Surgical Instruments Manufacturing  
-  
Other Uses
Alloys, Jewellery, Sculptures, Statues  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.00 Blood/mg dm-3  
36
0.00 Blood/mg dm-3  
40
In Bone
0.02 p.p.m.  
34
0.00 p.p.m.  
99+
Physical
Melting Point
1,750.00 °C  
17
2,410.00 °C  
7
Boiling Point
4,790.00 °C  
8
4,527.00 °C  
10
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silvery White  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
3.00  
13
6.50  
5
Brinell Hardness
390.00 MPa  
35
1,670.00 MPa  
5
Vickers Hardness
295.00 MPa  
99+
1,760.00 MPa  
8
Speed of Sound
2,490.00 m/s  
99+
4,825.00 m/s  
17
Optical Properties
  
  
Refractive Index
1.60  
33
2.40  
7
Reflectivity
15.00 %  
36
78.00 %  
8
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Th  
Ir  
Isotopes
  
  
Known Isotopes
28  
11
34  
5
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
2.20  
5
Sanderson Electronegativity
1.30  
25
2.20  
8
Allred Rochow Electronegativity
1.11  
30
1.55  
12
Mulliken-Jaffe Electronegativity
1.30  
33
2.20  
6
Allen Electronegativity
1.30  
40
1.68  
20
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
1.80  
99+
Ionization Energies
  
  
1st Energy Level
587.00 kJ/mol  
99+
880.00 kJ/mol  
9
2nd Energy Level
1,110.00 kJ/mol  
99+
1,600.00 kJ/mol  
36
3rd Energy Level
1,978.00 kJ/mol  
99+
2,256.10 kJ/mol  
99+
4th Energy Level
2,780.00 kJ/mol  
99+
880.00 kJ/mol  
99+
5th Energy Level
5,870.00 kJ/mol  
99+
8,800.00 kJ/mol  
8
6th Energy Level
5,870.00 kJ/mol  
99+
8,800.00 kJ/mol  
25
7th Energy level
5,870.00 kJ/mol  
99+
8,800.00 kJ/mol  
22
8th Energy Level
5,870.00 kJ/mol  
99+
8,800.00 kJ/mol  
22
9th Energy Level
5,870.00 kJ/mol  
99+
8,800.00 kJ/mol  
21
10th Energy Level
5,870.00 kJ/mol  
99+
8,800.00 kJ/mol  
23
11th Energy Level
5,870.00 kJ/mol  
99+
8,800.00 kJ/mol  
20
12th Energy Level
5,870.00 kJ/mol  
99+
8,800.00 kJ/mol  
40
13th Energy Level
5,870.00 kJ/mol  
99+
8,800.00 kJ/mol  
15
14th Energy Level
5,870.00 kJ/mol  
38
8,800.00 kJ/mol  
14
15th Energy Level
58,700.00 kJ/mol  
99+
88,000.00 kJ/mol  
8
16th Energy Level
58,700.00 kJ/mol  
39
88,000.00 kJ/mol  
9
17th Energy Level
587.40 kJ/mol  
99+
880.00 kJ/mol  
26
18th Energy Level
5,870.00 kJ/mol  
99+
8,800.00 kJ/mol  
15
19th Energy Level
587.00 kJ/mol  
99+
880.00 kJ/mol  
24
20th Energy Level
587.00 kJ/mol  
99+
880.00 kJ/mol  
14
21st Energy Level
587.00 kJ/mol  
99+
880.00 kJ/mol  
37
22nd Energy Level
587.00 kJ/mol  
99+
880.00 kJ/mol  
12
23rd Energy Level
587.00 kJ/mol  
99+
8,800.00 kJ/mol  
7
24th Energy Level
587.00 kJ/mol  
99+
880.00 kJ/mol  
8
25th Energy Level
587.00 kJ/mol  
99+
880.00 kJ/mol  
6
26th Energy Level
587.40 kJ/mol  
99+
880.00 kJ/mol  
6
27th Energy Level
587.40 kJ/mol  
99+
880.00 kJ/mol  
5
28th Energy Level
587.40 kJ/mol  
99+
880.00 kJ/mol  
8
29th Energy Level
587.00 kJ/mol  
99+
880.00 kJ/mol  
9
30th Energy Level
587.40 kJ/mol  
99+
880.00 kJ/mol  
6
Electrochemical Equivalent
2.16 g/amp-hr  
28
1.14 g/amp-hr  
99+
Electron Work Function
3.41 eV  
99+
4.55 eV  
18
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity  
Flammable, Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
90  
28
77  
39
Electron Configuration
[Rn] 6d2 7s2  
[Xe] 4f14 5d7 6s2  
Crystal Structure
Face Centered Cubic (FCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Thorium.jpg#100  
FCC-Crystal-Structure-of-Iridium.jpg#100  
Atom
  
  
Number of Protons
90  
28
74  
99+
Number of Neutrons
142  
16
110  
28
Number of Electrons
90  
28
74  
99+
Radius of an Atom
  
  
Atomic Radius
179.80 pm  
17
136.00 pm  
99+
Covalent Radius
206.00 pm  
7
141.00 pm  
99+
Van der Waals Radius
237.00 pm  
19
202.00 pm  
34
Atomic Weight
232.04 amu  
23
192.22 amu  
34
Atomic Volume
19.90 cm3/mol  
32
9.53 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Actinium
  
Osmium
  
Next Element
Protactinium
  
Platinum
  
Valence Electron Potential
59.30 (-eV)  
24
140.00 (-eV)  
5
Lattice Constant
508.42 pm  
16
383.90 pm  
29
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.10  
99+
1.58  
35
Mechanical
Density
  
  
Density At Room Temperature
11.72 g/cm3  
34
22.56 g/cm3  
10
Density When Liquid (at m.p.)
11.72 g/cm3  
32
19.00 g/cm3  
13
Tensile Strength
75.00 MPa  
30
2,000.00 MPa  
2
Viscosity
0.00  
23
0.00  
21
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
22
0.00 (Pa)  
26
Elasticity properties
  
  
Shear Modulus
31.00 GPa  
25
210.00 GPa  
2
Bulk Modulus
54.00 GPa  
23
320.00 GPa  
3
Young's Modulus
79.00 GPa  
26
528.00 GPa  
1
Poisson Ratio
0.27  
20
0.26  
22
Other Mechanical Properties
Ductile  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
11.70  
36
21.78  
12
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
16
Susceptibility
0.00  
24
0.00  
5
Electrical Properties
  
  
Electrical Property
Superconductor  
Conductor  
Resistivity
157.00 nΩ·m  
22
47.10 nΩ·m  
99+
Electrical Conductivity
0.07 106/cm Ω  
36
0.19 106/cm Ω  
10
Electron Affinity
0.00 kJ/mol  
99+
151.00 kJ/mol  
4
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.13 J/(kg K)  
40
Molar Heat Capacity
26.23 J/mol·K  
38
25.10 J/mol·K  
99+
Thermal Conductivity
54.00 W/m·K  
28
147.00 W/m·K  
10
Critical Temperature
2,023.00 K  
20
2,719.00 K  
8
Thermal Expansion
11.00 µm/(m·K)  
99+
6.40 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
429.00 kJ/mol  
20
799.10 kJ/mol  
1
Enthalpy of Fusion
15.48 kJ/mol  
19
35.23 kJ/mol  
1
Enthalpy of Atomization
468.60 kJ/mol  
20
837.00 kJ/mol  
1
Standard Molar Entropy
27.30 J/mol.K  
99+
35.50 J/mol.K  
99+
Summary >>
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