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Manganese vs Iridium

Manganese
Iridium
Iridium vs Manganese


Periodic Table
Symbol
Mn  
Ir  
Group Number
7  
11
9  
9
Period Number
4  
6  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7439965  
99+
7439885  
99+
Space Group Name
I_ 43m  
Fm_ 3m  
Space Group Number
217.00  
4
225.00  
2
Facts
Interesting Facts
  • Manganese is an essential trace element in all forms of life.
  • Manganese metal oxidizes very easily, but it does not fuse that easily.
  
  • 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
Johann Gottlieb Gahn  
Smithson Tennant  
Discovery
In 1774  
In 1803  
Abundance
  
  
Abundance In Universe
8 * 10-4 %  
8
2 * 10-7 %  
22
Abundance In Sun
~0.001 %  
8
~0.0000002 %  
25
Abundance In Meteorites
0.27 %  
8
0.00 %  
29
Abundance In Earth's Crust
0.11 %  
8
0.00 %  
99+
Abundance In Oceans
0.00 %  
13
Not Available  
Abundance In Humans
0.00 %  
13
Not Available  
Uses
Uses & Benefits
  • This metal is very brittle hence it mostly not used as a pure metal, but its alloys are very useful
  • Its alloy Manganese steel is extremely strong and used in railway tracks, safes, prison bars and riffle barrels.
  
  • 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  
Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
NA  
NA  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Toxic  
Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.08 Blood/mg dm-3  
14
Not Available  
In Bone
100.00 p.p.m.  
8
Not Available  
Physical Properties
Melting Point
1,245.00 °C  
37
2,410.00 °C  
7
Boiling Point
1,962.00 °C  
99+
4,527.00 °C  
10
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silvery White  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
6.50  
5
Brinell Hardness
196.00 MPa  
99+
1,670.00 MPa  
5
Vickers Hardness
Not Available  
1,760.00 MPa  
3
Speed of Sound
5,150.00 m/s  
7
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
Mn  
Ir  
Isotopes
  
  
Known Isotopes
21  
18
34  
5
Electronegativity
  
  
Pauling Electronegativity
1.55  
25
2.20  
4
Sanderson Electronegativity
2.20  
7
Not Available  
Allred Rochow Electronegativity
1.60  
9
1.55  
11
Allen Electronegativity
1.75  
15
1.68  
17
Electropositivity
  
  
Pauling Electropositivity
2.45  
29
1.80  
99+
Ionization Energies
  
  
1st Energy Level
717.30 kJ/mol  
30
880.00 kJ/mol  
9
2nd Energy Level
1,509.00 kJ/mol  
39
1,600.00 kJ/mol  
35
3rd Energy Level
3,248.00 kJ/mol  
21
Not Available  
4th Energy Level
4,940.00 kJ/mol  
20
Not Available  
5th Energy Level
6,990.00 kJ/mol  
17
Not Available  
6th Energy Level
9,220.00 kJ/mol  
16
Not Available  
7th Energy level
11,500.00 kJ/mol  
16
Not Available  
8th Energy Level
18,770.00 kJ/mol  
5
Not Available  
9th Energy Level
21,400.00 kJ/mol  
6
Not Available  
10th Energy Level
23,960.00 kJ/mol  
9
Not Available  
11th Energy Level
27,590.00 kJ/mol  
10
Not Available  
12th Energy Level
30,330.00 kJ/mol  
10
Not Available  
13th Energy Level
33,150.00 kJ/mol  
11
Not Available  
14th Energy Level
38,880.00 kJ/mol  
10
Not Available  
15th Energy Level
41,987.00 kJ/mol  
13
Not Available  
16th Energy Level
109,480.00 kJ/mol  
1
Not Available  
17th Energy Level
118,100.00 kJ/mol  
2
Not Available  
18th Energy Level
127,100.00 kJ/mol  
3
Not Available  
19th Energy Level
138,600.00 kJ/mol  
4
Not Available  
20th Energy Level
148,500.00 kJ/mol  
6
Not Available  
21st Energy Level
158,600.00 kJ/mol  
6
Not Available  
22nd Energy Level
172,500.00 kJ/mol  
5
Not Available  
23rd Energy Level
181,380.00 kJ/mol  
5
Not Available  
Electrochemical Equivalent
0.29 g/amp-hr  
99+
1.14 g/amp-hr  
99+
Electron Work Function
4.10 eV  
25
4.55 eV  
13
Other Chemical Properties
Ionization, Radioactive Isotopes  
Flammable, Ionization, Radioactive Isotopes, Radioactivity  
Atomic Properties
Atomic Number
25  
99+
77  
39
Electron Configuration
[Ar] 3d5 4s2  
[Xe] 4f14 5d7 6s2  
Crystal Structure
Body Centered Cubic (BCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
FCC-Crystal-Structure-of-Iridium.jpg#100  
Atom
  
  
Number of Protons
25  
99+
74  
99+
Number of Neutrons
30  
99+
110  
27
Number of Electrons
25  
99+
74  
99+
Radius of an Atom
  
  
Atomic Radius
127.00 pm  
99+
136.00 pm  
99+
Covalent Radius
139.00 pm  
99+
141.00 pm  
99+
Van der Waals Radius
200.00 pm  
28
202.00 pm  
27
Atomic Weight
54.94 amu  
99+
192.22 amu  
34
Atomic Volume
1.39 cm3/mol  
99+
9.53 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Chromium
  
Osmium
  
Next Element
Iron
  
Platinum
  
Valence Electron Potential
220.00 (-eV)  
2
140.00 (-eV)  
5
Lattice Constant
891.25 pm  
1
383.90 pm  
26
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
Not Available  
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
7.21 g/cm3  
99+
22.56 g/cm3  
10
Density When Liquid (at m.p.)
5.95 g/cm3  
99+
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
0.00 (Pa)  
12
Not Available  
Vapor Pressure at 2000 K
Not Available  
0.00 (Pa)  
25
Elasticity properties
  
  
Shear Modulus
Not Available  
210.00 GPa  
2
Bulk Modulus
120.00 GPa  
14
320.00 GPa  
3
Young's Modulus
198.00 GPa  
12
528.00 GPa  
1
Poisson Ratio
Not Available  
0.26  
22
Other Mechanical Properties
NA  
NA  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
7.21  
99+
21.78  
3
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
1.44 nΩ·m  
99+
47.10 nΩ·m  
99+
Electrical Conductivity
0.01 106/cm Ω  
99+
0.19 106/cm Ω  
10
Electron Affinity
0.00 kJ/mol  
40
151.00 kJ/mol  
4
Thermal Properties
Specific Heat
0.48 J/(kg K)  
11
0.13 J/(kg K)  
39
Molar Heat Capacity
26.32 J/mol·K  
29
25.10 J/mol·K  
99+
Thermal Conductivity
7.81 W/m·K  
99+
147.00 W/m·K  
10
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
21.70 µm/(m·K)  
21
6.40 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
219.70 kJ/mol  
99+
799.10 kJ/mol  
1
Enthalpy of Fusion
14.64 kJ/mol  
23
35.23 kJ/mol  
1
Enthalpy of Atomization
280.30 kJ/mol  
38
837.00 kJ/mol  
1
Standard Molar Entropy
32.00 J/mol.K  
99+
35.50 J/mol.K  
99+
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