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Hafnium vs Meitnerium

Hafnium
Meitnerium
Meitnerium vs Hafnium


Periodic Table
Symbol
Hf  
Mt  
Group Number
4  
14
9  
9
Period Number
6  
7  
Block
d block  
d block  
Element Family
Transition Metal  
Probably Transition  
CAS Number
7440586  
30
54038016  
10
Space Group Name
P63/mmc  
-  
Space Group Number
194.00  
7
166.00  
9
Facts
Interesting Facts
  • Hafnium metal is highly reactive, hence not found free in nature.
  • Hafnium metal as predicated after Mendeleev finished his periodic table.
  
Meitnerium is named after Lise Meitner, an Austrian physicist.  
Sources
By-product Zirconium Refining  
Bombarding Bi209 with Accelerated Nuclei of Fe58, Synthetically Produced  
History
  
  
Who Discovered
Dirk Coster and George de Hevesy  
Gesellschaft für Schwerionenforschung  
Discovery
In 1922  
In 1982  
Abundance
  
  
Abundance In Universe
0.00 %  
26
0.00 %  
40
Abundance In Sun
0.00 %  
26
-  
Abundance In Meteorites
0.00 %  
37
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
31
-  
Abundance In Oceans
0.00 %  
27
-  
Abundance In Humans
0.00 %  
14
-  
Uses
Uses & Benefits
  • It has an ability to absorb neutrons and hence it is used to make control rods in nuclear submarines. And this metal is also used in Plasma welding torches.
  • It alloys with iron, titanium and niobium are very useful.
  
  • Currently known uses of Meitnerium metal are limited to research purpose only.
  
Industrial Uses
Ammunition Industry  
-  
Medical Uses
-  
-  
Other Uses
Alloys, In Nuclear Reactors, Nuclear Research, Research Purposes  
-  
Biological Properties
  
  
Toxicity
Toxic  
-  
Present in Human Body
No  
No  
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
2,150.00 °C  
10
-  
Boiling Point
5,400.00 °C  
5
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gray  
-  
Luster
Metallic  
Unknown Luster  
Hardness
  
  
Mohs Hardness
5.50  
7
-  
Brinell Hardness
1,450.00 MPa  
6
400.00 MPa  
34
Vickers Hardness
1,520.00 MPa  
10
350.00 MPa  
99+
Speed of Sound
3,010.00 m/s  
39
3,200.00 m/s  
35
Optical Properties
  
  
Refractive Index
2.00  
15
1.30  
99+
Reflectivity
71.00 %  
12
68.00 %  
15
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Hf  
Mt  
Isotopes
  
  
Known Isotopes
32  
7
4  
33
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
1.30  
33
Sanderson Electronegativity
1.30  
25
1.90  
13
Allred Rochow Electronegativity
1.23  
26
1.30  
25
Mulliken-Jaffe Electronegativity
1.30  
33
1.30  
33
Allen Electronegativity
1.16  
99+
1.30  
40
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
2.00  
99+
Ionization Energies
  
  
1st Energy Level
658.50 kJ/mol  
40
800.80 kJ/mol  
15
2nd Energy Level
1,440.00 kJ/mol  
99+
1,823.60 kJ/mol  
18
3rd Energy Level
2,250.00 kJ/mol  
99+
2,904.20 kJ/mol  
31
4th Energy Level
3,216.00 kJ/mol  
99+
3,859.40 kJ/mol  
99+
5th Energy Level
6,585.00 kJ/mol  
33
4,920.80 kJ/mol  
99+
6th Energy Level
6,585.00 kJ/mol  
99+
8,000.00 kJ/mol  
34
7th Energy level
6,580.00 kJ/mol  
99+
8,000.00 kJ/mol  
28
8th Energy Level
6,580.00 kJ/mol  
99+
8,000.00 kJ/mol  
28
9th Energy Level
6,585.00 kJ/mol  
38
6,700.00 kJ/mol  
36
10th Energy Level
6,590.00 kJ/mol  
40
5,800.00 kJ/mol  
99+
11th Energy Level
6,585.00 kJ/mol  
40
6,300.00 kJ/mol  
99+
12th Energy Level
6,580.00 kJ/mol  
99+
0.00 kJ/mol  
99+
13th Energy Level
6,580.00 kJ/mol  
35
8,000.00 kJ/mol  
20
14th Energy Level
658.50 kJ/mol  
99+
1,156.00 kJ/mol  
99+
15th Energy Level
65,800.00 kJ/mol  
34
80,000.00 kJ/mol  
17
16th Energy Level
658.50 kJ/mol  
99+
58,700.00 kJ/mol  
39
17th Energy Level
658.50 kJ/mol  
99+
1,110.00 kJ/mol  
20
18th Energy Level
6,585.00 kJ/mol  
36
8,000.00 kJ/mol  
23
19th Energy Level
658.50 kJ/mol  
99+
1,110.00 kJ/mol  
17
20th Energy Level
658.00 kJ/mol  
37
850.00 kJ/mol  
18
21st Energy Level
658.50 kJ/mol  
99+
800.00 kJ/mol  
99+
22nd Energy Level
658.00 kJ/mol  
31
380.00 kJ/mol  
99+
23rd Energy Level
658.50 kJ/mol  
99+
8,000.00 kJ/mol  
9
24th Energy Level
658.50 kJ/mol  
31
565.60 kJ/mol  
99+
25th Energy Level
658.00 kJ/mol  
33
800.00 kJ/mol  
13
26th Energy Level
658.50 kJ/mol  
32
800.00 kJ/mol  
13
27th Energy Level
658.50 kJ/mol  
33
800.00 kJ/mol  
12
28th Energy Level
658.50 kJ/mol  
38
800.00 kJ/mol  
18
29th Energy Level
658.50 kJ/mol  
39
800.00 kJ/mol  
18
30th Energy Level
658.00 kJ/mol  
35
800.00 kJ/mol  
13
Electrochemical Equivalent
1.66 g/amp-hr  
99+
3.00 g/amp-hr  
21
Electron Work Function
3.90 eV  
36
4.90 eV  
12
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
72  
99+
109  
9
Electron Configuration
[Xe] 4f14 5d2 6s2  
[Rn] 5f14 6d7 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Face Centered Cubic (FCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
FCC-Crystal-Structure-of-Meitnerium.jpg#100  
Atom
  
  
Number of Protons
72  
99+
109  
9
Number of Neutrons
106  
30
157  
8
Number of Electrons
72  
99+
109  
9
Radius of an Atom
  
  
Atomic Radius
159.00 pm  
30
122.00 pm  
99+
Covalent Radius
175.00 pm  
25
129.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
260.00 pm  
9
Atomic Weight
178.49 amu  
39
278.00 amu  
7
Atomic Volume
13.60 cm3/mol  
99+
20.20 cm3/mol  
30
Adjacent Atomic Numbers
  
  
Previous Element
Lutetium
  
Hassium
  
Next Element
Tantalum
  
Darmstadtium
  
Valence Electron Potential
81.00 (-eV)  
16
31.20 (-eV)  
99+
Lattice Constant
319.64 pm  
99+
0.00 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
-  
Lattice C/A Ratio
1.58  
34
1.59  
27
Mechanical
Density
  
  
Density At Room Temperature
13.31 g/cm3  
27
37.40 g/cm3  
2
Density When Liquid (at m.p.)
12.00 g/cm3  
31
37.40 g/cm3  
2
Tensile Strength
445.00 MPa  
9
80.00 MPa  
29
Viscosity
0.00  
28
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)  
25
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
30.00 GPa  
27
35.00 GPa  
21
Bulk Modulus
110.00 GPa  
15
0.00 GPa  
99+
Young's Modulus
78.00 GPa  
27
13.50 GPa  
99+
Poisson Ratio
0.37  
7
0.25  
24
Other Mechanical Properties
Ductile, Malleable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.31  
30
37.40  
4
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
9
0.00 H/m  
12
Susceptibility
0.00  
13
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
331.00 nΩ·m  
14
0.35 nΩ·m  
99+
Electrical Conductivity
0.03 106/cm Ω  
99+
0.00 106/cm Ω  
99+
Electron Affinity
0.00 kJ/mol  
99+
50.00 kJ/mol  
26
Thermal
Specific Heat
0.14 J/(kg K)  
38
0.10 J/(kg K)  
99+
Molar Heat Capacity
25.73 J/mol·K  
99+
27.00 J/mol·K  
29
Thermal Conductivity
23.00 W/m·K  
99+
0.00 W/m·K  
99+
Critical Temperature
2,500.00 K  
11
1,323.00 K  
99+
Thermal Expansion
5.90 µm/(m·K)  
99+
10.30 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
661.10 kJ/mol  
6
110.00 kJ/mol  
99+
Enthalpy of Fusion
25.10 kJ/mol  
8
-  
Enthalpy of Atomization
703.00 kJ/mol  
5
350.20 kJ/mol  
37
Standard Molar Entropy
43.60 J/mol.K  
99+
63.80 J/mol.K  
22
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