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