Magnesium vs Iridium
Periodic Table
Symbol
Mg
Ir
Group Number
2
16
9
9
Period Number
3
6
Block
s block
d block
Element Family
Alkaline Earth
Transition Metal
CAS Number
7439954
99+
7439885
99+
Space Group Name
P63/mmc
Fm_ 3m
Space Group Number
194.00
5
225.00
2
Facts
Interesting Facts
- Magnesium ions are present in every chlorophyll of every green plant .
- Controlling Magnesium fire by pouring water on it will result in explosions.
- Iridium element occurs as natural alloys of Platinum and Osmium.
- Iridium element is known as the most corrosion resistance metal .
Sources
By Electrolysis Process, In Ocean, Mining
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Joseph Black
Smithson Tennant
Discovery
In 1755
In 1803
Abundance
Abundance In Universe
6 * 10-2 %
2
2 * 10-7 %
22
Abundance In Sun
~0.07 %
2
~0.0000002 %
25
Abundance In Meteorites
12.00 %
2
0.00 %
29
Abundance In Earth's Crust
2.90 %
4
0.00 %
99+
Abundance In Oceans
0.13 %
2
Not Available
Abundance In Humans
0.03 %
4
Not Available
Uses
Uses & Benefits
- Magnesium aluminum alloy improves the mechanical strength and welding characteristics and hence it is used in aeroplane and car manufacturing.
- It is also used to remove sulfur from the molten iron and steel.
- 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
Aerospace Industry, Ammunition Industry, Automobile Industry, Chemical Industry, Pharmaceutical Industry
Automobile Industry, Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Surgical Instruments Manufacturing
Alloys
Biological Properties
Toxicity
Non Toxic
Toxic
Present in Human Body
Yes
Yes
In Blood
37.80 Blood/mg dm-3
5
Not Available
In Bone
1,800.00 p.p.m.
4
Not Available
Physical Properties
Melting Point
650.00 °C
99+
2,410.00 °C
7
Boiling Point
1,107.00 °C
99+
4,527.00 °C
10
Appearance
Physical State
Solid
Solid
Color
Gray
Silvery White
Luster
NA
Metallic
Hardness
Mohs Hardness
2.50
14
6.50
5
Brinell Hardness
260.00 MPa
36
1,670.00 MPa
5
Vickers Hardness
Not Available
1,760.00 MPa
3
Speed of Sound
4,940.00 m/s
11
4,825.00 m/s
13
Optical Properties
Reflectivity
74.00 %
7
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
Mg
Ir
Isotopes
Known Isotopes
15
24
34
5
Electronegativity
Pauling Electronegativity
1.31
31
2.20
4
Sanderson Electronegativity
1.32
18
Not Available
Allred Rochow Electronegativity
1.23
25
1.55
11
Mulliken-Jaffe Electronegativity
1.37
16
Not Available
Allen Electronegativity
1.29
35
1.68
17
Electropositivity
Pauling Electropositivity
2.69
23
1.80
99+
Ionization Energies
1st Energy Level
737.70 kJ/mol
24
880.00 kJ/mol
9
2nd Energy Level
1,450.70 kJ/mol
99+
1,600.00 kJ/mol
35
3rd Energy Level
7,732.70 kJ/mol
5
Not Available
4th Energy Level
10,542.50 kJ/mol
4
Not Available
5th Energy Level
13,630.00 kJ/mol
3
Not Available
6th Energy Level
18,020.00 kJ/mol
3
Not Available
7th Energy level
21,711.00 kJ/mol
3
Not Available
8th Energy Level
25,661.00 kJ/mol
3
Not Available
9th Energy Level
31,653.00 kJ/mol
3
Not Available
10th Energy Level
35,458.00 kJ/mol
5
Not Available
11th Energy Level
169,988.00 kJ/mol
1
Not Available
12th Energy Level
189,368.00 kJ/mol
1
Not Available
Electrochemical Equivalent
0.45 g/amp-hr
99+
1.14 g/amp-hr
99+
Electron Work Function
3.66 eV
29
4.55 eV
13
Other Chemical Properties
Corrosion, Highly Inflammable, Ionization, Solubility
Flammable, Ionization, Radioactive Isotopes, Radioactivity
Atomic Properties
Atomic Number
12
99+
77
39
Electron Configuration
[Ne] 3s2
[Xe] 4f14 5d7 6s2
Crystal Structure
Hexagonal Close Packed (HCP)
Face Centered Cubic (FCC)
Crystal Lattice
HCP-Crystal-Structure-of-Magnesium.jpg#100
FCC-Crystal-Structure-of-Iridium.jpg#100
Atom
Number of Protons
12
99+
74
99+
Number of Neutrons
12
99+
110
27
Number of Electrons
12
99+
74
99+
Radius of an Atom
Atomic Radius
160.00 pm
27
136.00 pm
99+
Covalent Radius
141.00 pm
99+
141.00 pm
99+
Van der Waals Radius
173.00 pm
37
202.00 pm
27
Atomic Weight
24.31 amu
99+
192.22 amu
34
Atomic Volume
13.97 cm3/mol
37
9.53 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
40.00 (-eV)
99+
140.00 (-eV)
5
Lattice Constant
320.94 pm
99+
383.90 pm
26
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
1.74 g/cm3
99+
22.56 g/cm3
10
Density When Liquid (at m.p.)
1.58 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 2000 K
Not Available
0.00 (Pa)
25
Elasticity properties
Shear Modulus
17.00 GPa
37
210.00 GPa
2
Bulk Modulus
45.00 GPa
25
320.00 GPa
3
Young's Modulus
45.00 GPa
39
528.00 GPa
1
Poisson Ratio
0.29
15
0.26
22
Other Mechanical Properties
NA
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
1.74
99+
21.78
3
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
43.90 nΩ·m
99+
47.10 nΩ·m
99+
Electrical Conductivity
0.23 106/cm Ω
7
0.19 106/cm Ω
10
Electron Affinity
0.00 kJ/mol
40
151.00 kJ/mol
4
Thermal Properties
Specific Heat
1.02 J/(kg K)
4
0.13 J/(kg K)
39
Molar Heat Capacity
24.87 J/mol·K
99+
25.10 J/mol·K
99+
Thermal Conductivity
156.00 W/m·K
8
147.00 W/m·K
10
Critical Temperature
Not Available
Not Available
Thermal Expansion
24.80 µm/(m·K)
15
6.40 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
128.70 kJ/mol
99+
799.10 kJ/mol
1
Enthalpy of Fusion
8.95 kJ/mol
39
35.23 kJ/mol
1
Enthalpy of Atomization
148.50 kJ/mol
99+
837.00 kJ/mol
1
Standard Molar Entropy
32.70 J/mol.K
99+
35.50 J/mol.K
99+
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