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Iridium vs Tungsten

Iridium
Tungsten
Tungsten vs Iridium


Periodic Table
Symbol
Ir   
W   
Group Number
9   
9
6   
12
Period Number
6   
6   
Block
d block   
d block   
Element Family
Transition Metal   
Transition Metal   
CAS Number
7439885   
99+
7440337   
99+
Space Group Name
Fm_ 3m   
Im_ 3m   
Space Group Number
225.00   
2
229.00   
1
Facts
Interesting Facts
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  
  • Tungsten element has the second highest melting point.
  • Pure tungsten can easily cut down with the help of hacksaw.
  
Sources
Found in Minerals, Mining, Ores of Minerals   
Earth's crust, Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
Smithson Tennant   
Not Available   
Discovery
In 1803   
In 1781   
Abundance
  
  
Abundance In Universe
2 * 10-7 %   
22
5 * 10-8 %   
27
Abundance In Sun
~0.0000002 %   
25
~0.0000004 %   
23
Abundance In Meteorites
0.00 %   
29
0.00 %   
39
Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
39
Abundance In Oceans
Not Available   
0.00 %   
18
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.
  
  • Tungsten and its alloys are used in high-temperature applications like welding electrodes, high-temperature furnace, etc.
  • Tungsten carbide is very hard and used in metal working, mining and petroleum industry.
  
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry   
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys   
Alloys   
Biological Properties
  
  
Toxicity
Toxic   
Non Toxic   
Present in Human Body
Yes   
Yes   
In Blood
Not Available   
0.00 Blood/mg dm-3   
31
In Bone
Not Available   
0.00 p.p.m.   
35
Physical Properties
Melting Point
2,410.00 °C   
7
3,410.00 °C   
1
Boiling Point
4,527.00 °C   
10
5,660.00 °C   
1
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Grayish White   
Luster
Metallic   
Lustrous   
Hardness
  
  
Mohs Hardness
6.50   
5
7.50   
2
Brinell Hardness
1,670.00 MPa   
5
2,000.00 MPa   
4
Vickers Hardness
1,760.00 MPa   
3
3,430.00 MPa   
1
Speed of Sound
4,825.00 m/s   
13
4,620.00 m/s   
16
Optical Properties
  
  
Reflectivity
78.00 %   
6
62.00 %   
13
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   
W   
Isotopes
  
  
Known Isotopes
34   
5
33   
6
Electronegativity
  
  
Pauling Electronegativity
2.20   
4
2.36   
2
Sanderson Electronegativity
Not Available   
0.98   
23
Allred Rochow Electronegativity
1.55   
11
1.40   
19
Allen Electronegativity
1.68   
17
1.47   
29
Electropositivity
  
  
Pauling Electropositivity
1.80   
99+
1.64   
99+
Ionization Energies
  
  
1st Energy Level
880.00 kJ/mol   
9
770.00 kJ/mol   
16
2nd Energy Level
1,600.00 kJ/mol   
35
1,700.00 kJ/mol   
29
Electrochemical Equivalent
1.14 g/amp-hr   
99+
1.14 g/amp-hr   
99+
Electron Work Function
4.55 eV   
13
4.55 eV   
13
Other Chemical Properties
Flammable, Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
77   
39
74   
99+
Electron Configuration
[Xe] 4f14 5d7 6s2   
[Xe] 4f14 5d4 6s2   
Crystal Structure
Face Centered Cubic (FCC)   
Body Centered Cubic (BCC)   
Crystal Lattice
FCC-Crystal-Structure-of-Iridium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
74   
99+
74   
99+
Number of Neutrons
110   
27
110   
27
Number of Electrons
74   
99+
74   
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm   
99+
139.00 pm   
39
Covalent Radius
141.00 pm   
99+
162.00 pm   
29
Van der Waals Radius
202.00 pm   
27
200.00 pm   
28
Atomic Weight
192.22 amu   
34
183.84 amu   
37
Atomic Volume
9.53 cm3/mol   
99+
9.53 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Osmium
  
Tantalum
  
Next Element
Platinum
  
Rhenium
  
Valence Electron Potential
140.00 (-eV)   
5
140.00 (-eV)   
5
Lattice Constant
383.90 pm   
26
316.52 pm   
99+
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
22.56 g/cm3   
10
19.25 g/cm3   
16
Density When Liquid (at m.p.)
19.00 g/cm3   
3
17.60 g/cm3   
5
Tensile Strength
2,000.00 MPa   
2
370.00 MPa   
10
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.00 (Pa)   
25
0.00 (Pa)   
32
Elasticity properties
  
  
Shear Modulus
210.00 GPa   
2
161.00 GPa   
5
Bulk Modulus
320.00 GPa   
3
310.00 GPa   
4
Young's Modulus
528.00 GPa   
1
411.00 GPa   
4
Poisson Ratio
0.26   
22
0.28   
17
Other Mechanical Properties
NA   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
21.78   
3
19.22   
9
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Superconductor   
Resistivity
47.10 nΩ·m   
99+
52.80 nΩ·m   
99+
Electrical Conductivity
0.19 106/cm Ω   
10
0.19 106/cm Ω   
10
Electron Affinity
151.00 kJ/mol   
4
78.60 kJ/mol   
13
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+
24.27 J/mol·K   
99+
Thermal Conductivity
147.00 W/m·K   
10
173.00 W/m·K   
7
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
6.40 µm/(m·K)   
99+
4.50 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
799.10 kJ/mol   
1
799.10 kJ/mol   
1
Enthalpy of Fusion
35.23 kJ/mol   
1
35.23 kJ/mol   
1
Enthalpy of Atomization
837.00 kJ/mol   
1
837.00 kJ/mol   
1
Standard Molar Entropy
35.50 J/mol.K   
99+
32.60 J/mol.K   
99+
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