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Iridium Rhenium Comparison

Iridium
Rhenium
Rhenium Iridium comparison


Periodic Table
Symbol
Ir  
Re  
Group Number
9  
9
7  
11
Period Number
6  
6  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7439885  
99+
7440155  
99+
Space Group Name
Fm_ 3m  
P63/mmc  
Space Group Number
225.00  
3
194.00  
7
Facts
Interesting Facts
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  
  • Chemical properties of Rhenium are similar to Manganese.
  • Rhenium metal is created while refining Molybdenum.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Smithson Tennant  
Masataka Ogawa  
Discovery
In 1803  
In 1908  
Abundance
  
  
Abundance In Universe
0.00 %  
23
0.00 %  
30
Abundance In Sun
0.00 %  
25
0.00 %  
29
Abundance In Meteorites
0.00 %  
29
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
0.00 %  
34
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.
  
  • Alloys of Rhenium are used as an electric contact material. It can resist withstand arc corrosion.
  • Its catalysts are used in hydrogenation of fine chemicals. Its Alloy with nickel is used to produce turbine blades.
  
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry  
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Toxic  
Low Toxic  
Present in Human Body
Yes  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
2,410.00 °C  
7
3,180.00 °C  
2
Boiling Point
4,527.00 °C  
10
5,627.00 °C  
2
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
6.50  
5
7.00  
3
Brinell Hardness
1,670.00 MPa  
5
1,320.00 MPa  
8
Vickers Hardness
1,760.00 MPa  
8
1,350.00 MPa  
12
Speed of Sound
4,825.00 m/s  
17
4,700.00 m/s  
19
Optical Properties
  
  
Refractive Index
2.40  
7
1.90  
18
Reflectivity
78.00 %  
8
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ir  
Re  
Isotopes
  
  
Known Isotopes
34  
5
33  
6
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
1.90  
12
Sanderson Electronegativity
2.20  
8
1.90  
13
Allred Rochow Electronegativity
1.55  
12
1.46  
16
Mulliken-Jaffe Electronegativity
2.20  
6
1.90  
13
Allen Electronegativity
1.68  
20
1.60  
24
Electropositivity
  
  
Pauling Electropositivity
1.80  
99+
2.10  
99+
Ionization Energies
  
  
1st Energy Level
880.00 kJ/mol  
9
760.00 kJ/mol  
20
2nd Energy Level
1,600.00 kJ/mol  
36
1,260.00 kJ/mol  
99+
3rd Energy Level
2,256.10 kJ/mol  
99+
2,510.00 kJ/mol  
99+
4th Energy Level
880.00 kJ/mol  
99+
3,640.00 kJ/mol  
99+
5th Energy Level
8,800.00 kJ/mol  
8
7,600.00 kJ/mol  
20
6th Energy Level
8,800.00 kJ/mol  
25
7,600.00 kJ/mol  
37
7th Energy level
8,800.00 kJ/mol  
22
7,600.00 kJ/mol  
31
8th Energy Level
8,800.00 kJ/mol  
22
5,560.00 kJ/mol  
99+
9th Energy Level
8,800.00 kJ/mol  
21
5,560.00 kJ/mol  
99+
10th Energy Level
8,800.00 kJ/mol  
23
7,600.00 kJ/mol  
31
11th Energy Level
8,800.00 kJ/mol  
20
7,600.00 kJ/mol  
30
12th Energy Level
8,800.00 kJ/mol  
40
7,600.00 kJ/mol  
99+
13th Energy Level
8,800.00 kJ/mol  
15
7,600.00 kJ/mol  
23
14th Energy Level
8,800.00 kJ/mol  
14
7,600.00 kJ/mol  
20
15th Energy Level
88,000.00 kJ/mol  
8
76,000.00 kJ/mol  
20
16th Energy Level
88,000.00 kJ/mol  
9
76,000.00 kJ/mol  
15
17th Energy Level
880.00 kJ/mol  
26
760.10 kJ/mol  
36
18th Energy Level
8,800.00 kJ/mol  
15
7,600.00 kJ/mol  
26
19th Energy Level
880.00 kJ/mol  
24
760.40 kJ/mol  
33
20th Energy Level
880.00 kJ/mol  
14
760.00 kJ/mol  
27
21st Energy Level
880.00 kJ/mol  
37
760.00 kJ/mol  
99+
22nd Energy Level
880.00 kJ/mol  
12
760.00 kJ/mol  
21
23rd Energy Level
8,800.00 kJ/mol  
7
760.00 kJ/mol  
99+
24th Energy Level
880.00 kJ/mol  
8
760.00 kJ/mol  
18
25th Energy Level
880.00 kJ/mol  
6
760.00 kJ/mol  
18
26th Energy Level
880.00 kJ/mol  
6
760.00 kJ/mol  
18
27th Energy Level
880.00 kJ/mol  
5
760.00 kJ/mol  
17
28th Energy Level
880.00 kJ/mol  
8
760.00 kJ/mol  
23
29th Energy Level
880.00 kJ/mol  
9
760.00 kJ/mol  
24
30th Energy Level
880.00 kJ/mol  
6
760.00 kJ/mol  
18
Electrochemical Equivalent
1.14 g/amp-hr  
99+
0.99 g/amp-hr  
99+
Electron Work Function
4.55 eV  
18
4.96 eV  
11
Other Chemical Properties
Flammable, Ionization, Radioactive Isotopes, Radioactivity  
Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
77  
39
75  
99+
Electron Configuration
[Xe] 4f14 5d7 6s2  
[Xe] 4f14 5d5 6s2  
Crystal Structure
Face Centered Cubic (FCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Iridium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
74  
99+
75  
40
Number of Neutrons
110  
28
111  
27
Number of Electrons
74  
99+
75  
40
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
137.00 pm  
99+
Covalent Radius
141.00 pm  
99+
151.00 pm  
36
Van der Waals Radius
202.00 pm  
34
200.00 pm  
35
Atomic Weight
192.22 amu  
34
186.21 amu  
36
Atomic Volume
9.53 cm3/mol  
99+
8.85 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Osmium
  
Tungsten
  
Next Element
Platinum
  
Osmium
  
Valence Electron Potential
140.00 (-eV)  
5
180.00 (-eV)  
3
Lattice Constant
383.90 pm  
29
276.10 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.58  
35
1.62  
17
Mechanical
Density
  
  
Density At Room Temperature
22.56 g/cm3  
10
21.02 g/cm3  
12
Density When Liquid (at m.p.)
19.00 g/cm3  
13
18.90 g/cm3  
14
Tensile Strength
2,000.00 MPa  
2
1,070.00 MPa  
3
Viscosity
0.00  
21
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
26
0.00 (Pa)  
40
Elasticity properties
  
  
Shear Modulus
210.00 GPa  
2
178.00 GPa  
3
Bulk Modulus
320.00 GPa  
3
370.00 GPa  
2
Young's Modulus
528.00 GPa  
1
463.00 GPa  
2
Poisson Ratio
0.26  
22
0.30  
14
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
21.78  
12
21.02  
14
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
16
0.00 H/m  
8
Susceptibility
0.00  
5
0.00  
26
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
47.10 nΩ·m  
99+
193.00 nΩ·m  
20
Electrical Conductivity
0.19 106/cm Ω  
10
0.05 106/cm Ω  
38
Electron Affinity
151.00 kJ/mol  
4
14.50 kJ/mol  
99+
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.13 J/(kg K)  
40
Molar Heat Capacity
25.10 J/mol·K  
99+
25.48 J/mol·K  
99+
Thermal Conductivity
147.00 W/m·K  
10
48.00 W/m·K  
31
Critical Temperature
2,719.00 K  
8
3,459.00 K  
2
Thermal Expansion
6.40 µm/(m·K)  
99+
6.20 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
799.10 kJ/mol  
1
707.10 kJ/mol  
4
Enthalpy of Fusion
35.23 kJ/mol  
1
33.05 kJ/mol  
2
Enthalpy of Atomization
837.00 kJ/mol  
1
791.00 kJ/mol  
2
Standard Molar Entropy
35.50 J/mol.K  
99+
36.90 J/mol.K  
99+
Summary >>
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