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Iridium vs Yttrium

Iridium
Yttrium
Yttrium vs Iridium


Periodic Table
Symbol
Ir  
Y  
Group Number
9  
9
3  
15
Period Number
6  
5  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7439885  
99+
7440655  
25
Space Group Name
Fm_ 3m  
P63/mmc  
Space Group Number
225.00  
2
194.00  
5
Facts
Interesting Facts
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  
  • Yttrium Metal is highly toxic.
  • Yttrium Metal is highly reactive in nature hence not found free in nature.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Smithson Tennant  
Johan Gadolin  
Discovery
In 1803  
In 1794  
Abundance
  
  
Abundance In Universe
2 * 10-7 %  
22
7 * 10-7 %  
17
Abundance In Sun
~0.0000002 %  
25
~0.0000001 %  
26
Abundance In Meteorites
0.00 %  
29
0.00 %  
21
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
22
Abundance In Oceans
Not Available  
0.00 %  
25
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.
  
  • Yttrium metal is used in different alloys, as it increases the strength of aluminum Magnesium alloy. It is used for radar microwave filter.
  • It is also used as a catalyst in ethene polymerisation.
  
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry  
Electrical Industry, Electronic Industry  
Medical Uses
NA  
NA  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Toxic  
Highly Toxic  
Present in Human Body
Yes  
Yes  
In Blood
Not Available  
0.00 Blood/mg dm-3  
26
In Bone
Not Available  
0.07 p.p.m.  
25
Physical Properties
Melting Point
2,410.00 °C  
7
1,523.00 °C  
27
Boiling Point
4,527.00 °C  
10
3,337.00 °C  
21
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
Metallic  
NA  
Hardness
  
  
Mohs Hardness
6.50  
5
Not Available  
Brinell Hardness
1,670.00 MPa  
5
589.00 MPa  
22
Vickers Hardness
1,760.00 MPa  
3
Not Available  
Speed of Sound
4,825.00 m/s  
13
3,300.00 m/s  
23
Optical Properties
  
  
Reflectivity
78.00 %  
6
Not Available  
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  
Y  
Isotopes
  
  
Known Isotopes
34  
5
19  
20
Electronegativity
  
  
Pauling Electronegativity
2.20  
4
1.22  
38
Sanderson Electronegativity
Not Available  
0.65  
29
Allred Rochow Electronegativity
1.55  
11
1.11  
29
Allen Electronegativity
1.68  
17
1.12  
38
Electropositivity
  
  
Pauling Electropositivity
1.80  
99+
2.78  
16
Ionization Energies
  
  
1st Energy Level
880.00 kJ/mol  
9
600.00 kJ/mol  
99+
2nd Energy Level
1,600.00 kJ/mol  
35
1,180.00 kJ/mol  
99+
3rd Energy Level
Not Available  
1,980.00 kJ/mol  
99+
4th Energy Level
Not Available  
5,847.00 kJ/mol  
10
5th Energy Level
Not Available  
7,430.00 kJ/mol  
14
6th Energy Level
Not Available  
8,970.00 kJ/mol  
17
7th Energy level
Not Available  
11,190.00 kJ/mol  
18
8th Energy Level
Not Available  
12,450.00 kJ/mol  
18
9th Energy Level
Not Available  
14,110.00 kJ/mol  
19
10th Energy Level
Not Available  
18,400.00 kJ/mol  
17
11th Energy Level
Not Available  
19,900.00 kJ/mol  
18
12th Energy Level
Not Available  
36,090.00 kJ/mol  
5
Electrochemical Equivalent
1.14 g/amp-hr  
99+
1.11 g/amp-hr  
99+
Electron Work Function
4.55 eV  
13
3.10 eV  
35
Other Chemical Properties
Flammable, Ionization, Radioactive Isotopes, Radioactivity  
Chemical Stability, Flammable, Ionization, Radioactive Isotopes, Solubility  
Atomic Properties
Atomic Number
77  
39
39  
99+
Electron Configuration
[Xe] 4f14 5d7 6s2  
[Kr] 4d1 5s2  
Crystal Structure
Face Centered Cubic (FCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Iridium.jpg#100  
HCP-Crystal-Structure-of-Yttrium.jpg#100  
Atom
  
  
Number of Protons
74  
99+
39  
99+
Number of Neutrons
110  
27
50  
99+
Number of Electrons
74  
99+
39  
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
180.00 pm  
14
Covalent Radius
141.00 pm  
99+
190.00 pm  
18
Van der Waals Radius
202.00 pm  
27
200.00 pm  
28
Atomic Weight
192.22 amu  
34
88.91 amu  
99+
Atomic Volume
9.53 cm3/mol  
99+
19.80 cm3/mol  
21
Adjacent Atomic Numbers
  
  
Previous Element
Osmium
  
Strontium
  
Next Element
Platinum
  
Zirconium
  
Valence Electron Potential
140.00 (-eV)  
5
48.00 (-eV)  
30
Lattice Constant
383.90 pm  
26
364.74 pm  
31
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
Not Available  
1.57  
16
Mechanical Properties
Density
  
  
Density At Room Temperature
22.56 g/cm3  
10
4.47 g/cm3  
99+
Density When Liquid (at m.p.)
19.00 g/cm3  
3
4.24 g/cm3  
99+
Tensile Strength
2,000.00 MPa  
2
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available  
0.00 (Pa)  
32
Vapor Pressure at 2000 K
0.00 (Pa)  
25
4.27 (Pa)  
10
Elasticity properties
  
  
Shear Modulus
210.00 GPa  
2
25.60 GPa  
30
Bulk Modulus
320.00 GPa  
3
41.20 GPa  
30
Young's Modulus
528.00 GPa  
1
63.50 GPa  
32
Poisson Ratio
0.26  
22
0.24  
26
Other Mechanical Properties
NA  
Ductile  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
21.78  
3
4.47  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
47.10 nΩ·m  
99+
596.00 nΩ·m  
8
Electrical Conductivity
0.19 106/cm Ω  
10
0.02 106/cm Ω  
99+
Electron Affinity
151.00 kJ/mol  
4
29.60 kJ/mol  
30
Thermal Properties
Specific Heat
0.13 J/(kg K)  
39
0.30 J/(kg K)  
18
Molar Heat Capacity
25.10 J/mol·K  
99+
26.53 J/mol·K  
27
Thermal Conductivity
147.00 W/m·K  
10
17.20 W/m·K  
99+
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
6.40 µm/(m·K)  
99+
10.60 µm/(m·K)  
37
Enthalpy
  
  
Enthalpy of Vaporization
799.10 kJ/mol  
1
393.00 kJ/mol  
18
Enthalpy of Fusion
35.23 kJ/mol  
1
17.15 kJ/mol  
16
Enthalpy of Atomization
837.00 kJ/mol  
1
418.00 kJ/mol  
18
Standard Molar Entropy
35.50 J/mol.K  
99+
44.40 J/mol.K  
33
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