Iridium vs Plutonium
Periodic Table
Symbol
Ir
Pu
Group Number
9
9
0
18
Period Number
6
7
Block
d block
f block
Element Family
Transition Metal
Actinide
CAS Number
7439885
99+
7440075
99+
Space Group Name
Fm_ 3m
P121/m1
Space Group Number
225.00
2
11.00
13
Facts
Interesting Facts
- Iridium element occurs as natural alloys of Platinum and Osmium.
- Iridium element is known as the most corrosion resistance metal .
- Plutonium metal if obtain from ores of uranium metal.
- Plutonium metal is very sensitive to the change in atmospheric conditions like temperature and pressure.
Sources
Found in Minerals, Mining, Ores of Minerals
Mining, Ores of metals
History
Who Discovered
Smithson Tennant
Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy, Edwin McMillan
Discovery
In 1803
In Between 1940 1941
Abundance
Abundance In Universe
2 * 10-7 %
22
Not Available
Abundance In Sun
~0.0000002 %
25
~-9999 %
Abundance In Meteorites
0.00 %
29
Not Available
Abundance In Earth's Crust
0.00 %
99+
Not Available
Uses
Uses & Benefits
- 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.
- Plutonium was used in atomic bombs and still it is being used in various weapons and Ammunition industry.
- It is also used in nuclear power plant as source of energy for space missions.
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry
Aerospace Industry, Ammunition Industry
Medical Uses
NA
NA
Other Uses
Alloys
Alloys
Biological Properties
Toxicity
Toxic
Toxic
Present in Human Body
Yes
No
In Blood
Not Available
0.00 Blood/mg dm-3
37
In Bone
Not Available
0.00 p.p.m.
36
Physical Properties
Melting Point
2,410.00 °C
7
639.50 °C
99+
Boiling Point
4,527.00 °C
10
3,235.00 °C
24
Appearance
Physical State
Solid
Solid
Color
Silvery White
Silvery White
Luster
Metallic
NA
Hardness
Mohs Hardness
6.50
5
Not Available
Brinell Hardness
1,670.00 MPa
5
Not Available
Vickers Hardness
1,760.00 MPa
3
Not Available
Speed of Sound
4,825.00 m/s
13
2,260.00 m/s
99+
Optical Properties
Reflectivity
78.00 %
6
Not Available
Allotropes
No
No
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Chemical Properties
Chemical Formula
Ir
Pu
Isotopes
Known Isotopes
34
5
20
19
Electronegativity
Pauling Electronegativity
2.20
4
1.28
33
Allred Rochow Electronegativity
1.55
11
1.22
26
Allen Electronegativity
1.68
17
Not Available
Electropositivity
Pauling Electropositivity
1.80
99+
2.72
21
Ionization Energies
1st Energy Level
880.00 kJ/mol
9
584.70 kJ/mol
99+
2nd Energy Level
1,600.00 kJ/mol
35
1,128.00 kJ/mol
99+
3rd Energy Level
Not Available
2,084.00 kJ/mol
99+
4th Energy Level
Not Available
3,338.00 kJ/mol
99+
Electrochemical Equivalent
1.14 g/amp-hr
99+
2.28 g/amp-hr
22
Electron Work Function
4.55 eV
13
Not Available
Other Chemical Properties
Flammable, Ionization, Radioactive Isotopes, Radioactivity
Corrosion, Ionization, Radioactive Isotopes, Radioactivity
Atomic Properties
Atomic Number
77
39
94
24
Electron Configuration
[Xe] 4f14 5d7 6s2
[Rn] 5f6 7s2
Crystal Structure
Face Centered Cubic (FCC)
Monoclinic (MON)
Crystal Lattice
FCC-Crystal-Structure-of-Iridium.jpg#100
MON-Crystal-Structure-of-Plutonium.jpg#100
Atom
Number of Protons
74
99+
94
24
Number of Neutrons
110
27
150
11
Number of Electrons
74
99+
94
24
Radius of an Atom
Atomic Radius
136.00 pm
99+
159.00 pm
28
Covalent Radius
141.00 pm
99+
187.00 pm
20
Van der Waals Radius
202.00 pm
27
200.00 pm
28
Atomic Weight
192.22 amu
34
244.00 amu
19
Atomic Volume
9.53 cm3/mol
99+
12.32 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
140.00 (-eV)
5
64.90 (-eV)
21
Lattice Constant
383.90 pm
26
618.30 pm
4
Lattice Angles
π/2, π/2, π/2
NA
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
22.56 g/cm3
10
19.82 g/cm3
13
Density When Liquid (at m.p.)
19.00 g/cm3
3
16.63 g/cm3
8
Tensile Strength
2,000.00 MPa
2
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
0.00 (Pa)
26
Vapor Pressure at 2000 K
0.00 (Pa)
25
2.20 (Pa)
12
Elasticity properties
Shear Modulus
210.00 GPa
2
43.00 GPa
18
Bulk Modulus
320.00 GPa
3
Not Available
Young's Modulus
528.00 GPa
1
96.00 GPa
21
Poisson Ratio
0.26
22
0.21
32
Other Mechanical Properties
NA
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
21.78
3
19.84
7
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Poor Conductor
Resistivity
47.10 nΩ·m
99+
1.46 nΩ·m
99+
Electrical Conductivity
0.19 106/cm Ω
10
0.01 106/cm Ω
99+
Electron Affinity
151.00 kJ/mol
4
Not Available
Thermal Properties
Specific Heat
0.13 J/(kg K)
39
0.13 J/(kg K)
39
Molar Heat Capacity
25.10 J/mol·K
99+
35.50 J/mol·K
3
Thermal Conductivity
147.00 W/m·K
10
6.74 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
6.40 µm/(m·K)
99+
46.70 µm/(m·K)
6
Enthalpy
Enthalpy of Vaporization
799.10 kJ/mol
1
344.00 kJ/mol
25
Enthalpy of Fusion
35.23 kJ/mol
1
2.82 kJ/mol
99+
Enthalpy of Atomization
837.00 kJ/mol
1
360.00 kJ/mol
26
Standard Molar Entropy
35.50 J/mol.K
99+
Not Available
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