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Dubnium vs Iridium

Dubnium
Iridium
Iridium vs Dubnium


Periodic Table
Symbol
Db  
Ir  
Group Number
5  
13
9  
9
Period Number
7  
6  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
53850354  
14
7439885  
99+
Space Group Name
-  
Fm_ 3m  
Space Group Number
166.00  
9
225.00  
3
Facts
Interesting Facts
  • IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
  • In the production of Dubnium, thermal gradient chromatography is used.
  
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  
Sources
Produced by Bombarding Am243 with Ne22, Synthetically Produced  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Joint Institute for Nuclear Research  
Smithson Tennant  
Discovery
In 1968  
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+
Abundance In Oceans
-  
-  
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Dubnium 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
Research Purposes  
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
-  
2,410.00 °C  
7
Boiling Point
0.00 °C  
99+
4,527.00 °C  
10
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Silvery White  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
6.50  
5
Brinell Hardness
330.00 MPa  
38
1,670.00 MPa  
5
Vickers Hardness
400.00 MPa  
99+
1,760.00 MPa  
8
Speed of Sound
2,680.00 m/s  
99+
4,825.00 m/s  
17
Optical Properties
  
  
Refractive Index
1.20  
99+
2.40  
7
Reflectivity
55.00 %  
27
78.00 %  
8
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Db  
Ir  
Isotopes
  
  
Known Isotopes
10  
28
34  
5
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
2.20  
5
Sanderson Electronegativity
1.30  
25
2.20  
8
Allred Rochow Electronegativity
1.30  
25
1.55  
12
Mulliken-Jaffe Electronegativity
1.10  
99+
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
664.80 kJ/mol  
38
880.00 kJ/mol  
9
2nd Energy Level
1,546.70 kJ/mol  
39
1,600.00 kJ/mol  
36
3rd Energy Level
2,378.40 kJ/mol  
99+
2,256.10 kJ/mol  
99+
4th Energy Level
3,298.80 kJ/mol  
99+
880.00 kJ/mol  
99+
5th Energy Level
4,305.20 kJ/mol  
99+
8,800.00 kJ/mol  
8
6th Energy Level
12,900.00 kJ/mol  
5
8,800.00 kJ/mol  
25
7th Energy level
3,300.00 kJ/mol  
99+
8,800.00 kJ/mol  
22
8th Energy Level
5,280.00 kJ/mol  
99+
8,800.00 kJ/mol  
22
9th Energy Level
5,780.00 kJ/mol  
99+
8,800.00 kJ/mol  
21
10th Energy Level
8,830.00 kJ/mol  
22
8,800.00 kJ/mol  
23
11th Energy Level
3,300.00 kJ/mol  
99+
8,800.00 kJ/mol  
20
12th Energy Level
88,300.00 kJ/mol  
2
8,800.00 kJ/mol  
40
13th Energy Level
4,760.00 kJ/mol  
99+
8,800.00 kJ/mol  
15
14th Energy Level
1,120.00 kJ/mol  
99+
8,800.00 kJ/mol  
14
15th Energy Level
33,000.00 kJ/mol  
99+
88,000.00 kJ/mol  
8
16th Energy Level
33,000.00 kJ/mol  
99+
88,000.00 kJ/mol  
9
17th Energy Level
1,129.00 kJ/mol  
19
880.00 kJ/mol  
26
18th Energy Level
0.00 kJ/mol  
99+
8,800.00 kJ/mol  
15
19th Energy Level
1,094.90 kJ/mol  
18
880.00 kJ/mol  
24
20th Energy Level
0.00 kJ/mol  
99+
880.00 kJ/mol  
14
21st Energy Level
883.00 kJ/mol  
36
880.00 kJ/mol  
37
22nd Energy Level
330.00 kJ/mol  
99+
880.00 kJ/mol  
12
23rd Energy Level
1,150.00 kJ/mol  
33
8,800.00 kJ/mol  
7
24th Energy Level
528.30 kJ/mol  
99+
880.00 kJ/mol  
8
25th Energy Level
0.00 kJ/mol  
99+
880.00 kJ/mol  
6
26th Energy Level
579.80 kJ/mol  
99+
880.00 kJ/mol  
6
27th Energy Level
0.00 kJ/mol  
99+
880.00 kJ/mol  
5
28th Energy Level
1,150.00 kJ/mol  
3
880.00 kJ/mol  
8
29th Energy Level
1,094.00 kJ/mol  
5
880.00 kJ/mol  
9
30th Energy Level
0.00 kJ/mol  
99+
880.00 kJ/mol  
6
Electrochemical Equivalent
3.00 g/amp-hr  
21
1.14 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
4.55 eV  
18
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Flammable, Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
105  
13
77  
39
Electron Configuration
[Rn] 5f14 6d3 7s2  
[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
105  
13
74  
99+
Number of Neutrons
157  
8
110  
28
Number of Electrons
105  
13
74  
99+
Radius of an Atom
  
  
Atomic Radius
139.00 pm  
99+
136.00 pm  
99+
Covalent Radius
149.00 pm  
37
141.00 pm  
99+
Van der Waals Radius
0.00 pm  
99+
202.00 pm  
34
Atomic Weight
268.00 amu  
10
192.22 amu  
34
Atomic Volume
22.80 cm3/mol  
17
9.53 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Rutherfordium
  
Osmium
  
Next Element
Seaborgium
  
Platinum
  
Valence Electron Potential
0.00 (-eV)  
99+
140.00 (-eV)  
5
Lattice Constant
-  
383.90 pm  
29
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.63  
14
1.58  
35
Mechanical
Density
  
  
Density At Room Temperature
29.30 g/cm3  
5
22.56 g/cm3  
10
Density When Liquid (at m.p.)
29.30 g/cm3  
6
19.00 g/cm3  
13
Tensile Strength
0.10 MPa  
99+
2,000.00 MPa  
2
Viscosity
0.00  
25
0.00  
21
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
26
Elasticity properties
  
  
Shear Modulus
34.00 GPa  
22
210.00 GPa  
2
Bulk Modulus
39.00 GPa  
39
320.00 GPa  
3
Young's Modulus
0.00 GPa  
99+
528.00 GPa  
1
Poisson Ratio
0.39  
5
0.26  
22
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
39.00  
3
21.78  
12
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
16
Susceptibility
0.00  
24
0.00  
5
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
6.80 nΩ·m  
99+
47.10 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.19 106/cm Ω  
10
Electron Affinity
-  
151.00 kJ/mol  
4
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.13 J/(kg K)  
40
Molar Heat Capacity
29.30 J/mol·K  
11
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
13.20 µm/(m·K)  
37
6.40 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
289.70 kJ/mol  
99+
799.10 kJ/mol  
1
Enthalpy of Fusion
-  
35.23 kJ/mol  
1
Enthalpy of Atomization
-  
837.00 kJ/mol  
1
Standard Molar Entropy
55.00 J/mol.K  
34
35.50 J/mol.K  
99+
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