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Lutetium Iridium Comparison


Iridium Lutetium comparison


Periodic Table

Symbol
Lu   
Ir   

Group Number
Not Available   
9   
9

Period Number
6   
6   

Block
f block   
d block   

Element Family
Lanthanide   
Transition Metal   

CAS Number
7439943   
99+
7439885   
99+

Space Group Name
P63/mmc   
Fm_ 3m   

Space Group Number
194.00   
5
225.00   
2

Facts

Interesting Facts
  • Metal dust of Lutetium element is highly explosive.
  • Lutetium metal is corrosion resistance and acts stable in air.
  
  • 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, Ores of Minerals   
Found in Minerals, Mining, Ores of Minerals   

History
  
  

Who Discovered
Georges Urbain and Carl Auer von Welsbach   
Smithson Tennant   

Discovery
In 1906   
In 1803   

Abundance
  
  

Abundance In Universe
1 * 10-8 %   
30
2 * 10-7 %   
22

Abundance In Sun
~0.0000001 %   
26
~0.0000002 %   
25

Abundance In Meteorites
0.00 %   
99+
0.00 %   
29

Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
99+

Abundance In Oceans
0.00 %   
99+
Not Available   

Uses

Uses & Benefits
  • Lutetium metal is used outside research. It has commercial uses like Industrial catalyst for cracking oil refineries of hydrocarbons .
  
  • 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
NA   
Automobile Industry, Electrical Industry, Electronic Industry   

Medical Uses
NA   
NA   

Other Uses
Alloys   
Alloys   

Biological Properties
  
  

Toxicity
Low Toxic   
Toxic   

Present in Human Body
No   
Yes   

Physical Properties

Melting Point
1,652.00 °C   
19
2,410.00 °C   
7

Boiling Point
3,402.00 °C   
19
4,527.00 °C   
10

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silvery White   
Silvery White   

Luster
Metallic   
Metallic   

Hardness
  
  

Mohs Hardness
Not Available   
6.50   
5

Brinell Hardness
893.00 MPa   
10
1,670.00 MPa   
5

Vickers Hardness
1,160.00 MPa   
8
1,760.00 MPa   
3

Speed of Sound
Not Available   
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
Lu   
Ir   

Isotopes
  
  

Known Isotopes
35   
4
34   
5

Electronegativity
  
  

Pauling Electronegativity
1.27   
34
2.20   
4

Allred Rochow Electronegativity
1.14   
28
1.55   
11

Allen Electronegativity
Not Available   
1.68   
17

Electropositivity
  
  

Pauling Electropositivity
2.73   
20
1.80   
99+

Ionization Energies
  
  

1st Energy Level
523.50 kJ/mol   
99+
880.00 kJ/mol   
9

2nd Energy Level
1,340.00 kJ/mol   
99+
1,600.00 kJ/mol   
35

3rd Energy Level
2,022.30 kJ/mol   
99+
Not Available   

4th Energy Level
4,370.00 kJ/mol   
28
Not Available   

5th Energy Level
6,445.00 kJ/mol   
21
Not Available   

Electrochemical Equivalent
2.18 g/amp-hr   
23
1.14 g/amp-hr   
99+

Electron Work Function
3.30 eV   
33
4.55 eV   
13

Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Flammable, Ionization, Radioactive Isotopes, Radioactivity   

Atomic Properties

Atomic Number
71   
99+
77   
39

Electron Configuration
[Xe] 6s2 4f14 5d1   
[Xe] 4f14 5d7 6s2   

Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
FCC-Crystal-Structure-of-Iridium.jpg#100   

Atom
  
  

Number of Protons
71   
99+
74   
99+

Number of Neutrons
104   
30
110   
27

Number of Electrons
71   
99+
74   
99+

Radius of an Atom
  
  

Atomic Radius
174.00 pm   
20
136.00 pm   
99+

Covalent Radius
187.00 pm   
20
141.00 pm   
99+

Van der Waals Radius
221.00 pm   
22
202.00 pm   
27

Atomic Weight
174.97 amu   
40
192.22 amu   
34

Atomic Volume
17.78 cm3/mol   
30
9.53 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Ytterbium
  
Osmium
  

Next Element
Hafnium
  
Platinum
  

Valence Electron Potential
50.90 (-eV)   
26
140.00 (-eV)   
5

Lattice Constant
350.31 pm   
99+
383.90 pm   
26

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   

Lattice C/A Ratio
1.59   
10
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
9.84 g/cm3   
38
22.56 g/cm3   
10

Density When Liquid (at m.p.)
9.30 g/cm3   
22
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)   
33
Not Available   

Vapor Pressure at 2000 K
3.18 (Pa)   
11
0.00 (Pa)   
25

Elasticity properties
  
  

Shear Modulus
27.20 GPa   
26
210.00 GPa   
2

Bulk Modulus
47.60 GPa   
23
320.00 GPa   
3

Young's Modulus
68.60 GPa   
30
528.00 GPa   
1

Poisson Ratio
0.26   
21
0.26   
22

Other Mechanical Properties
NA   
NA   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
9.84   
29
21.78   
3

Magnetic Ordering
Paramagnetic   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Conductor   
Conductor   

Resistivity
582.00 nΩ·m   
9
47.10 nΩ·m   
99+

Electrical Conductivity
0.02 106/cm Ω   
99+
0.19 106/cm Ω   
10

Electron Affinity
50.00 kJ/mol   
21
151.00 kJ/mol   
4

Thermal Properties

Specific Heat
0.15 J/(kg K)   
36
0.13 J/(kg K)   
39

Molar Heat Capacity
26.86 J/mol·K   
24
25.10 J/mol·K   
99+

Thermal Conductivity
16.40 W/m·K   
99+
147.00 W/m·K   
10

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
9.90 µm/(m·K)   
40
6.40 µm/(m·K)   
99+

Enthalpy
  
  

Enthalpy of Vaporization
355.90 kJ/mol   
22
799.10 kJ/mol   
1

Enthalpy of Fusion
18.70 kJ/mol   
13
35.23 kJ/mol   
1

Enthalpy of Atomization
398.00 kJ/mol   
20
837.00 kJ/mol   
1

Standard Molar Entropy
51.00 J/mol.K   
30
35.50 J/mol.K   
99+

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