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Iridium vs Europium

Iridium
Europium
Europium vs Iridium


Periodic Table
Symbol
Ir  
Eu  
Group Number
9  
9
3  
15
Period Number
6  
6  
Block
d block  
f block  
Element Family
Transition Metal  
Lanthanide  
CAS Number
7439885  
99+
7440531  
34
Space Group Name
Fm_ 3m  
Im_ 3m  
Space Group Number
225.00  
3
229.00  
2
Facts
Interesting Facts
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  
Europium is used in Euro banknotes for security features.  
Sources
Found in Minerals, Mining, Ores of Minerals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Smithson Tennant  
Eugène-Anatole Demarçay  
Discovery
In 1803  
In 1896  
Abundance
  
  
Abundance In Universe
0.00 %  
23
0.00 %  
28
Abundance In Sun
0.00 %  
25
0.00 %  
27
Abundance In Meteorites
0.00 %  
29
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
36
Abundance In Oceans
-  
0.00 %  
99+
Abundance In Humans
0.00 %  
24
0.00 %  
24
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.
  
  • Europium metals main uses is in the printing of euro banknotes. These notes glow red under UV light.
  • It is used in low energy light bulbs.
  
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry  
Chemical Industry  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Toxic  
Non Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
2,410.00 °C  
7
822.00 °C  
99+
Boiling Point
4,527.00 °C  
10
1,597.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
Metallic  
Lustrous  
Hardness
  
  
Mohs Hardness
6.50  
5
2.00  
17
Brinell Hardness
1,670.00 MPa  
5
167.00 MPa  
99+
Vickers Hardness
1,760.00 MPa  
8
167.00 MPa  
99+
Speed of Sound
4,825.00 m/s  
17
6,320.00 m/s  
4
Optical Properties
  
  
Refractive Index
2.40  
7
1.83  
19
Reflectivity
78.00 %  
8
65.00 %  
18
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ir  
Eu  
Isotopes
  
  
Known Isotopes
34  
5
31  
8
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
1.20  
40
Sanderson Electronegativity
2.20  
8
1.01  
99+
Allred Rochow Electronegativity
1.55  
12
1.20  
28
Mulliken-Jaffe Electronegativity
2.20  
6
1.20  
39
Allen Electronegativity
1.68  
20
1.20  
99+
Electropositivity
  
  
Pauling Electropositivity
1.80  
99+
2.50  
27
Ionization Energies
  
  
1st Energy Level
880.00 kJ/mol  
9
547.10 kJ/mol  
99+
2nd Energy Level
1,600.00 kJ/mol  
36
1,085.00 kJ/mol  
99+
3rd Energy Level
2,256.10 kJ/mol  
99+
2,404.00 kJ/mol  
99+
4th Energy Level
880.00 kJ/mol  
99+
4,120.00 kJ/mol  
99+
5th Energy Level
8,800.00 kJ/mol  
8
5,471.00 kJ/mol  
99+
6th Energy Level
8,800.00 kJ/mol  
25
5,471.00 kJ/mol  
99+
7th Energy level
8,800.00 kJ/mol  
22
5,470.00 kJ/mol  
99+
8th Energy Level
8,800.00 kJ/mol  
22
5,470.00 kJ/mol  
99+
9th Energy Level
8,800.00 kJ/mol  
21
5,990.00 kJ/mol  
99+
10th Energy Level
8,800.00 kJ/mol  
23
5,470.00 kJ/mol  
99+
11th Energy Level
8,800.00 kJ/mol  
20
5,470.00 kJ/mol  
99+
12th Energy Level
8,800.00 kJ/mol  
40
5,470.00 kJ/mol  
99+
13th Energy Level
8,800.00 kJ/mol  
15
5,800.00 kJ/mol  
99+
14th Energy Level
8,800.00 kJ/mol  
14
5,470.00 kJ/mol  
99+
15th Energy Level
88,000.00 kJ/mol  
8
54,700.00 kJ/mol  
99+
16th Energy Level
88,000.00 kJ/mol  
9
54,700.00 kJ/mol  
99+
17th Energy Level
880.00 kJ/mol  
26
547.10 kJ/mol  
99+
18th Energy Level
8,800.00 kJ/mol  
15
5,470.00 kJ/mol  
99+
19th Energy Level
880.00 kJ/mol  
24
547.10 kJ/mol  
99+
20th Energy Level
880.00 kJ/mol  
14
547.00 kJ/mol  
99+
21st Energy Level
880.00 kJ/mol  
37
547.10 kJ/mol  
99+
22nd Energy Level
880.00 kJ/mol  
12
547.00 kJ/mol  
99+
23rd Energy Level
8,800.00 kJ/mol  
7
547.10 kJ/mol  
99+
24th Energy Level
880.00 kJ/mol  
8
547.10 kJ/mol  
99+
25th Energy Level
880.00 kJ/mol  
6
547.00 kJ/mol  
99+
26th Energy Level
880.00 kJ/mol  
6
547.10 kJ/mol  
99+
27th Energy Level
880.00 kJ/mol  
5
547.10 kJ/mol  
99+
28th Energy Level
880.00 kJ/mol  
8
580.70 kJ/mol  
99+
29th Energy Level
880.00 kJ/mol  
9
547.10 kJ/mol  
99+
30th Energy Level
880.00 kJ/mol  
6
547.10 kJ/mol  
99+
Electrochemical Equivalent
1.14 g/amp-hr  
99+
1.89 g/amp-hr  
37
Electron Work Function
4.55 eV  
18
2.50 eV  
99+
Other Chemical Properties
Flammable, Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
77  
39
63  
99+
Electron Configuration
[Xe] 4f14 5d7 6s2  
[Xe] 4f7 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+
63  
99+
Number of Neutrons
110  
28
89  
39
Number of Electrons
74  
99+
63  
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
180.00 pm  
16
Covalent Radius
141.00 pm  
99+
198.00 pm  
13
Van der Waals Radius
202.00 pm  
34
233.00 pm  
22
Atomic Weight
192.22 amu  
34
151.96 amu  
99+
Atomic Volume
9.53 cm3/mol  
99+
28.90 cm3/mol  
11
Adjacent Atomic Numbers
  
  
Previous Element
Osmium
  
Samarium
  
Next Element
Platinum
  
Gadolinium
  
Valence Electron Potential
140.00 (-eV)  
5
45.60 (-eV)  
36
Lattice Constant
383.90 pm  
29
458.10 pm  
19
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.58  
35
1.58  
35
Mechanical
Density
  
  
Density At Room Temperature
22.56 g/cm3  
10
5.26 g/cm3  
99+
Density When Liquid (at m.p.)
19.00 g/cm3  
13
5.13 g/cm3  
99+
Tensile Strength
2,000.00 MPa  
2
120.00 MPa  
27
Viscosity
0.00  
21
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
19.40 (Pa)  
4
Vapor Pressure at 2000 K
0.00 (Pa)  
26
0.00 (Pa)  
30
Elasticity properties
  
  
Shear Modulus
210.00 GPa  
2
7.90 GPa  
99+
Bulk Modulus
320.00 GPa  
3
8.30 GPa  
99+
Young's Modulus
528.00 GPa  
1
18.20 GPa  
99+
Poisson Ratio
0.26  
22
0.15  
35
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
21.78  
12
5.24  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
16
0.00 H/m  
17
Susceptibility
0.00  
5
0.00  
15
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
47.10 nΩ·m  
99+
0.90 nΩ·m  
99+
Electrical Conductivity
0.19 106/cm Ω  
10
0.01 106/cm Ω  
99+
Electron Affinity
151.00 kJ/mol  
4
50.00 kJ/mol  
26
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.18 J/(kg K)  
34
Molar Heat Capacity
25.10 J/mol·K  
99+
27.66 J/mol·K  
19
Thermal Conductivity
147.00 W/m·K  
10
13.90 W/m·K  
99+
Critical Temperature
2,719.00 K  
8
1,099.00 K  
99+
Thermal Expansion
6.40 µm/(m·K)  
99+
35.00 µm/(m·K)  
8
Enthalpy
  
  
Enthalpy of Vaporization
799.10 kJ/mol  
1
143.50 kJ/mol  
99+
Enthalpy of Fusion
35.23 kJ/mol  
1
9.21 kJ/mol  
99+
Enthalpy of Atomization
837.00 kJ/mol  
1
180.00 kJ/mol  
99+
Standard Molar Entropy
35.50 J/mol.K  
99+
77.80 J/mol.K  
4
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