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Lutetium vs Iridium

Lutetium
Iridium
Iridium vs Lutetium


Periodic Table
Symbol
Lu  
Ir  
Group Number
3  
15
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  
7
225.00  
3
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
0.00 %  
31
0.00 %  
23
Abundance In Sun
0.00 %  
26
0.00 %  
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+
-  
Abundance In Humans
0.00 %  
24
0.00 %  
24
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
-  
Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Low Toxic  
Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
37
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
1,652.00 °C  
19
2,410.00 °C  
7
Boiling Point
3,402.00 °C  
20
4,527.00 °C  
10
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
4.50  
10
6.50  
5
Brinell Hardness
893.00 MPa  
11
1,670.00 MPa  
5
Vickers Hardness
1,160.00 MPa  
14
1,760.00 MPa  
8
Speed of Sound
5,200.00 m/s  
10
4,825.00 m/s  
17
Optical Properties
  
  
Refractive Index
1.90  
18
2.40  
7
Reflectivity
60.00 %  
23
78.00 %  
8
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Lu  
Ir  
Isotopes
  
  
Known Isotopes
35  
4
34  
5
Electronegativity
  
  
Pauling Electronegativity
1.27  
35
2.20  
5
Sanderson Electronegativity
1.27  
27
2.20  
8
Allred Rochow Electronegativity
1.14  
29
1.55  
12
Mulliken-Jaffe Electronegativity
1.27  
34
2.20  
6
Allen Electronegativity
1.27  
99+
1.68  
20
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  
36
3rd Energy Level
2,022.30 kJ/mol  
99+
2,256.10 kJ/mol  
99+
4th Energy Level
4,370.00 kJ/mol  
38
880.00 kJ/mol  
99+
5th Energy Level
6,445.00 kJ/mol  
34
8,800.00 kJ/mol  
8
6th Energy Level
5,230.00 kJ/mol  
99+
8,800.00 kJ/mol  
25
7th Energy level
5,230.00 kJ/mol  
99+
8,800.00 kJ/mol  
22
8th Energy Level
5,230.00 kJ/mol  
99+
8,800.00 kJ/mol  
22
9th Energy Level
5,230.00 kJ/mol  
99+
8,800.00 kJ/mol  
21
10th Energy Level
5,230.00 kJ/mol  
99+
8,800.00 kJ/mol  
23
11th Energy Level
5,235.00 kJ/mol  
99+
8,800.00 kJ/mol  
20
12th Energy Level
5,230.00 kJ/mol  
99+
8,800.00 kJ/mol  
40
13th Energy Level
5,230.00 kJ/mol  
99+
8,800.00 kJ/mol  
15
14th Energy Level
5,230.00 kJ/mol  
99+
8,800.00 kJ/mol  
14
15th Energy Level
52,300.00 kJ/mol  
99+
88,000.00 kJ/mol  
8
16th Energy Level
52,300.00 kJ/mol  
99+
88,000.00 kJ/mol  
9
17th Energy Level
523.50 kJ/mol  
99+
880.00 kJ/mol  
26
18th Energy Level
5,230.00 kJ/mol  
99+
8,800.00 kJ/mol  
15
19th Energy Level
523.50 kJ/mol  
99+
880.00 kJ/mol  
24
20th Energy Level
523.00 kJ/mol  
99+
880.00 kJ/mol  
14
21st Energy Level
523.50 kJ/mol  
99+
880.00 kJ/mol  
37
22nd Energy Level
523.00 kJ/mol  
99+
880.00 kJ/mol  
12
23rd Energy Level
5,230.00 kJ/mol  
28
8,800.00 kJ/mol  
7
24th Energy Level
523.50 kJ/mol  
99+
880.00 kJ/mol  
8
25th Energy Level
523.00 kJ/mol  
99+
880.00 kJ/mol  
6
26th Energy Level
523.50 kJ/mol  
99+
880.00 kJ/mol  
6
27th Energy Level
523.50 kJ/mol  
99+
880.00 kJ/mol  
5
28th Energy Level
523.50 kJ/mol  
99+
880.00 kJ/mol  
8
29th Energy Level
523.50 kJ/mol  
99+
880.00 kJ/mol  
9
30th Energy Level
523.00 kJ/mol  
99+
880.00 kJ/mol  
6
Electrochemical Equivalent
2.18 g/amp-hr  
27
1.14 g/amp-hr  
99+
Electron Work Function
3.30 eV  
99+
4.55 eV  
18
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Flammable, Ionization, Radioactive Isotopes, Radioactivity  
Atomic
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  
31
110  
28
Number of Electrons
71  
99+
74  
99+
Radius of an Atom
  
  
Atomic Radius
174.00 pm  
22
136.00 pm  
99+
Covalent Radius
187.00 pm  
20
141.00 pm  
99+
Van der Waals Radius
221.00 pm  
27
202.00 pm  
34
Atomic Weight
174.97 amu  
40
192.22 amu  
34
Atomic Volume
17.78 cm3/mol  
99+
9.53 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Ytterbium
  
Osmium
  
Next Element
Hafnium
  
Platinum
  
Valence Electron Potential
50.90 (-eV)  
27
140.00 (-eV)  
5
Lattice Constant
350.31 pm  
99+
383.90 pm  
29
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.59  
32
1.58  
35
Mechanical
Density
  
  
Density At Room Temperature
9.84 g/cm3  
99+
22.56 g/cm3  
10
Density When Liquid (at m.p.)
9.30 g/cm3  
99+
19.00 g/cm3  
13
Tensile Strength
230.00 MPa  
18
2,000.00 MPa  
2
Viscosity
0.00  
25
0.00  
21
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
35
0.00 (Pa)  
37
Vapor Pressure at 2000 K
3.18 (Pa)  
11
0.00 (Pa)  
26
Elasticity properties
  
  
Shear Modulus
27.20 GPa  
33
210.00 GPa  
2
Bulk Modulus
47.60 GPa  
25
320.00 GPa  
3
Young's Modulus
68.60 GPa  
32
528.00 GPa  
1
Poisson Ratio
0.26  
21
0.26  
22
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
9.84  
99+
21.78  
12
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
9
0.00 H/m  
16
Susceptibility
0.00  
14
0.00  
5
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  
26
151.00 kJ/mol  
4
Thermal
Specific Heat
0.15 J/(kg K)  
37
0.13 J/(kg K)  
40
Molar Heat Capacity
26.86 J/mol·K  
31
25.10 J/mol·K  
99+
Thermal Conductivity
16.40 W/m·K  
99+
147.00 W/m·K  
10
Critical Temperature
1,925.00 K  
23
2,719.00 K  
8
Thermal Expansion
9.90 µm/(m·K)  
99+
6.40 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
355.90 kJ/mol  
32
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  
26
837.00 kJ/mol  
1
Standard Molar Entropy
51.00 J/mol.K  
99+
35.50 J/mol.K  
99+
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