Home
 Compare Metals

Lawrencium vs Iridium

Lawrencium
Iridium
Iridium vs Lawrencium


Periodic Table
Symbol
Lr  
Ir  
Group Number
3  
15
9  
9
Period Number
7  
6  
Block
d block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
22537195  
15
7439885  
99+
Space Group Name
-  
Fm_ 3m  
Space Group Number
225.00  
3
225.00  
3
Facts
Interesting Facts
  • It is synthetically produced metal.
  • Radiation hazard can be produce by it.
  
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  
Sources
Bombarding Californium-252 with Boron Nuclei, Found in Minerals, Mining  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory and Joint Institute for Nuclear Research  
Smithson Tennant  
Discovery
In 1961–1971  
In 1803  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
23
Abundance In Sun
-  
0.00 %  
25
Abundance In Meteorites
0.00 %  
99+
0.00 %  
29
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Lawrencium metal are limited to research purpose only.
  
  • 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  
Medical Uses
-  
-  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
-  
Toxic  
Present in Human Body
No  
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
1,627.00 °C  
20
2,410.00 °C  
7
Boiling Point
0.00 °C  
99+
4,527.00 °C  
10
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silvery White  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
-  
6.50  
5
Brinell Hardness
500.00 MPa  
28
1,670.00 MPa  
5
Vickers Hardness
500.00 MPa  
35
1,760.00 MPa  
8
Speed of Sound
2,760.00 m/s  
99+
4,825.00 m/s  
17
Optical Properties
  
  
Refractive Index
1.30  
99+
2.40  
7
Reflectivity
65.00 %  
18
78.00 %  
8
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Lr  
Ir  
Isotopes
  
  
Known Isotopes
10  
28
34  
5
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
2.20  
5
Sanderson Electronegativity
1.30  
25
2.20  
8
Allred Rochow Electronegativity
1.30  
25
1.55  
12
Mulliken-Jaffe Electronegativity
1.30  
33
2.20  
6
Allen Electronegativity
1.30  
40
1.68  
20
Electropositivity
  
  
Pauling Electropositivity
2.00  
99+
1.80  
99+
Ionization Energies
  
  
1st Energy Level
470.00 kJ/mol  
99+
880.00 kJ/mol  
9
2nd Energy Level
1,428.00 kJ/mol  
99+
1,600.00 kJ/mol  
36
3rd Energy Level
2,228.00 kJ/mol  
99+
2,256.10 kJ/mol  
99+
4th Energy Level
4,910.00 kJ/mol  
31
880.00 kJ/mol  
99+
5th Energy Level
4,780.00 kJ/mol  
99+
8,800.00 kJ/mol  
8
6th Energy Level
4,780.00 kJ/mol  
99+
8,800.00 kJ/mol  
25
7th Energy level
4,780.00 kJ/mol  
99+
8,800.00 kJ/mol  
22
8th Energy Level
4,780.00 kJ/mol  
99+
8,800.00 kJ/mol  
22
9th Energy Level
4,780.00 kJ/mol  
99+
8,800.00 kJ/mol  
21
10th Energy Level
5,800.00 kJ/mol  
99+
8,800.00 kJ/mol  
23
11th Energy Level
5,800.00 kJ/mol  
99+
8,800.00 kJ/mol  
20
12th Energy Level
47,800.00 kJ/mol  
22
8,800.00 kJ/mol  
40
13th Energy Level
4,780.00 kJ/mol  
99+
8,800.00 kJ/mol  
15
14th Energy Level
1,186.00 kJ/mol  
99+
8,800.00 kJ/mol  
14
15th Energy Level
47,800.00 kJ/mol  
99+
88,000.00 kJ/mol  
8
16th Energy Level
470.00 kJ/mol  
99+
88,000.00 kJ/mol  
9
17th Energy Level
1,186.00 kJ/mol  
15
880.00 kJ/mol  
26
18th Energy Level
4,780.00 kJ/mol  
99+
8,800.00 kJ/mol  
15
19th Energy Level
1,186.00 kJ/mol  
12
880.00 kJ/mol  
24
20th Energy Level
860.00 kJ/mol  
17
880.00 kJ/mol  
14
21st Energy Level
1,186.00 kJ/mol  
27
880.00 kJ/mol  
37
22nd Energy Level
388.00 kJ/mol  
99+
880.00 kJ/mol  
12
23rd Energy Level
1,180.00 kJ/mol  
32
8,800.00 kJ/mol  
7
24th Energy Level
546.10 kJ/mol  
99+
880.00 kJ/mol  
8
25th Energy Level
0.00 kJ/mol  
99+
880.00 kJ/mol  
6
26th Energy Level
594.70 kJ/mol  
99+
880.00 kJ/mol  
6
27th Energy Level
470.00 kJ/mol  
99+
880.00 kJ/mol  
5
28th Energy Level
478.00 kJ/mol  
99+
880.00 kJ/mol  
8
29th Energy Level
580.00 kJ/mol  
99+
880.00 kJ/mol  
9
30th Energy Level
0.00 kJ/mol  
99+
880.00 kJ/mol  
6
Electrochemical Equivalent
3.23 g/amp-hr  
12
1.14 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
4.55 eV  
18
Other Chemical Properties
Ionization, Radioactive Isotopes  
Flammable, Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
103  
15
77  
39
Electron Configuration
[Rn] 5f14 7s2 7p1  
[Xe] 4f14 5d7 6s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Face Centered Cubic (FCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
FCC-Crystal-Structure-of-Iridium.jpg#100  
Atom
  
  
Number of Protons
103  
15
74  
99+
Number of Neutrons
157  
8
110  
28
Number of Electrons
103  
15
74  
99+
Radius of an Atom
  
  
Atomic Radius
162.00 pm  
28
136.00 pm  
99+
Covalent Radius
162.00 pm  
31
141.00 pm  
99+
Van der Waals Radius
246.00 pm  
12
202.00 pm  
34
Atomic Weight
266.00 amu  
12
192.22 amu  
34
Atomic Volume
35.10 cm3/mol  
7
9.53 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Nobelium
  
Osmium
  
Next Element
Rutherfordium
  
Platinum
  
Valence Electron Potential
0.00 (-eV)  
99+
140.00 (-eV)  
5
Lattice Constant
530.00 pm  
14
383.90 pm  
29
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.60  
22
1.58  
35
Mechanical
Density
  
  
Density At Room Temperature
15.00 g/cm3  
22
22.56 g/cm3  
10
Density When Liquid (at m.p.)
15.60 g/cm3  
20
19.00 g/cm3  
13
Tensile Strength
80.00 MPa  
29
2,000.00 MPa  
2
Viscosity
0.00  
25
0.00  
21
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
37
0.00 (Pa)  
26
Elasticity properties
  
  
Shear Modulus
30.00 GPa  
27
210.00 GPa  
2
Bulk Modulus
15.00 GPa  
99+
320.00 GPa  
3
Young's Modulus
210.00 GPa  
10
528.00 GPa  
1
Poisson Ratio
0.32  
12
0.26  
22
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
15.60  
22
21.78  
12
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
13
0.00 H/m  
16
Susceptibility
0.00  
23
0.00  
5
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
8.37 nΩ·m  
99+
47.10 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.19 106/cm Ω  
10
Electron Affinity
50.00 kJ/mol  
26
151.00 kJ/mol  
4
Thermal
Specific Heat
0.22 J/(kg K)  
29
0.13 J/(kg K)  
40
Molar Heat Capacity
27.00 J/mol·K  
29
25.10 J/mol·K  
99+
Thermal Conductivity
0.00 W/m·K  
99+
147.00 W/m·K  
10
Critical Temperature
1,323.00 K  
99+
2,719.00 K  
8
Thermal Expansion
8.50 µm/(m·K)  
99+
6.40 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
341.90 kJ/mol  
37
799.10 kJ/mol  
1
Enthalpy of Fusion
-  
35.23 kJ/mol  
1
Enthalpy of Atomization
580.00 kJ/mol  
14
837.00 kJ/mol  
1
Standard Molar Entropy
54.80 J/mol.K  
35
35.50 J/mol.K  
99+
Periodic Table >>
<< All

Compare Actinide Series

Actinide Series

Actinide Series

» More Actinide Series

Compare Actinide Series

» More Compare Actinide Series
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!