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Thulium vs Iridium

Thulium
Iridium
Iridium vs Thulium


Periodic Table
Symbol
Tm   
Ir   
Group Number
Not Available   
9   
9
Period Number
6   
6   
Block
f block   
d block   
Element Family
Lanthanide   
Transition Metal   
CAS Number
7440304   
99+
7439885   
99+
Space Group Name
P63/mmc   
Fm_ 3m   
Space Group Number
194.00   
5
225.00   
2
Facts
Interesting Facts
  • Thulium metal can resist corrosion due to dry air .
  • Only Tm-169 isotope of Thulium metal occur naturally.
  
  • 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
Per Teodor Cleve   
Smithson Tennant   
Discovery
In 1879   
In 1803   
Abundance
  
  
Abundance In Universe
1 * 10-8 %   
30
2 * 10-7 %   
22
Abundance In Sun
~0.00000002 %   
28
~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
  • Thulium metal produces isotopes that emits X-rays. This isotope is used in X-ray machine.
  • Thulium element is also used in Surgical equipment like laser.
  
  • 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, Nuclear Research, Research Purposes   
Alloys   
Biological Properties
  
  
Toxicity
Unknown   
Toxic   
Present in Human Body
No   
Yes   
Physical Properties
Melting Point
1,545.00 °C   
23
2,410.00 °C   
7
Boiling Point
1,730.00 °C   
99+
4,527.00 °C   
10
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery Gray   
Silvery White   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
6.50   
5
Brinell Hardness
471.00 MPa   
25
1,670.00 MPa   
5
Vickers Hardness
520.00 MPa   
21
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
Tm   
Ir   
Isotopes
  
  
Known Isotopes
32   
7
34   
5
Electronegativity
  
  
Pauling Electronegativity
1.25   
35
2.20   
4
Allred Rochow Electronegativity
1.11   
29
1.55   
11
Allen Electronegativity
Not Available   
1.68   
17
Electropositivity
  
  
Pauling Electropositivity
2.75   
19
1.80   
99+
Ionization Energies
  
  
1st Energy Level
596.70 kJ/mol   
99+
880.00 kJ/mol   
9
2nd Energy Level
1,160.00 kJ/mol   
99+
1,600.00 kJ/mol   
35
3rd Energy Level
2,285.00 kJ/mol   
99+
Not Available   
4th Energy Level
4,120.00 kJ/mol   
33
Not Available   
Electrochemical Equivalent
2.10 g/amp-hr   
26
1.14 g/amp-hr   
99+
Electron Work Function
Not Available   
4.55 eV   
13
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Flammable, Ionization, Radioactive Isotopes, Radioactivity   
Atomic Properties
Atomic Number
69   
99+
77   
39
Electron Configuration
[Xe] 4f13 6s2   
[Xe] 4f14 5d7 6s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Thulium.jpg#100   
FCC-Crystal-Structure-of-Iridium.jpg#100   
Atom
  
  
Number of Protons
69   
99+
74   
99+
Number of Neutrons
100   
32
110   
27
Number of Electrons
69   
99+
74   
99+
Radius of an Atom
  
  
Atomic Radius
176.00 pm   
18
136.00 pm   
99+
Covalent Radius
160.00 pm   
30
141.00 pm   
99+
Van der Waals Radius
Not Available   
202.00 pm   
27
Atomic Weight
168.93 amu   
99+
192.22 amu   
34
Atomic Volume
18.10 cm3/mol   
28
9.53 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Erbium
  
Osmium
  
Next Element
Ytterbium
  
Platinum
  
Valence Electron Potential
49.70 (-eV)   
28
140.00 (-eV)   
5
Lattice Constant
353.75 pm   
40
383.90 pm   
26
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.57   
17
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
9.32 g/cm3   
40
22.56 g/cm3   
10
Density When Liquid (at m.p.)
8.56 g/cm3   
24
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
0.06 (Pa)   
10
Not Available   
Vapor Pressure at 2000 K
Not Available   
0.00 (Pa)   
25
Elasticity properties
  
  
Shear Modulus
30.50 GPa   
22
210.00 GPa   
2
Bulk Modulus
44.50 GPa   
26
320.00 GPa   
3
Young's Modulus
74.00 GPa   
27
528.00 GPa   
1
Poisson Ratio
0.21   
31
0.26   
22
Other Mechanical Properties
Ductile, Malleable   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
9.32   
31
21.78   
3
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
676.00 nΩ·m   
5
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
0.16 J/(kg K)   
35
0.13 J/(kg K)   
39
Molar Heat Capacity
27.03 J/mol·K   
22
25.10 J/mol·K   
99+
Thermal Conductivity
16.90 W/m·K   
99+
147.00 W/m·K   
10
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
13.30 µm/(m·K)   
29
6.40 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
191.00 kJ/mol   
99+
799.10 kJ/mol   
1
Enthalpy of Fusion
16.80 kJ/mol   
17
35.23 kJ/mol   
1
Enthalpy of Atomization
247.00 kJ/mol   
99+
837.00 kJ/mol   
1
Standard Molar Entropy
74.00 J/mol.K   
9
35.50 J/mol.K   
99+
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