Home
 Compare Metals

Uranium vs Hafnium

Uranium
Hafnium
Hafnium vs Uranium


Periodic Table
Symbol
U  
Hf  
Group Number
0  
18
4  
14
Period Number
7  
6  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440611  
28
7440586  
30
Space Group Name
Cmcm  
P63/mmc  
Space Group Number
63.00  
13
194.00  
7
Facts
Interesting Facts
  • Major mining countries of Uranium include Russia, Australia, Namibia, Canada and Niger and total 33% Uranium are mine in Kazakhstan.
  
  • Hafnium metal is highly reactive, hence not found free in nature.
  • Hafnium metal as predicated after Mendeleev finished his periodic table.
  
Sources
Earth's crust, Mining, Ores of Minerals  
By-product Zirconium Refining  
History
  
  
Who Discovered
-  
Dirk Coster and George de Hevesy  
Discovery
In 1789  
In 1922  
Abundance
  
  
Abundance In Universe
0.00 %  
30
0.00 %  
26
Abundance In Sun
0.00 %  
26
0.00 %  
26
Abundance In Meteorites
0.00 %  
99+
0.00 %  
37
Abundance In Earth's Crust
0.00 %  
36
0.00 %  
31
Abundance In Oceans
0.00 %  
11
0.00 %  
27
Abundance In Humans
0.00 %  
24
0.00 %  
14
Uses
Uses & Benefits
  • The main use of this metal include nuclear fuel which is used to generate electricity yin nuclear power stations.
  • Synthetic elements like transuranium are made from Uranium metal.
  
  • 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.
  
Industrial Uses
Ammunition Industry, Chemical Industry  
Ammunition Industry  
Medical Uses
-  
-  
Other Uses
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues  
Alloys, In Nuclear Reactors, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
Toxic  
Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
37
0.00 Blood/mg dm-3  
40
In Bone
1.20 p.p.m.  
19
0.00 p.p.m.  
99+
Physical
Melting Point
1,132.00 °C  
39
2,150.00 °C  
10
Boiling Point
3,818.00 °C  
16
5,400.00 °C  
5
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery Gray  
Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
5.50  
7
Brinell Hardness
2,350.00 MPa  
2
1,450.00 MPa  
6
Vickers Hardness
1,960.00 MPa  
6
1,520.00 MPa  
10
Speed of Sound
3,155.00 m/s  
36
3,010.00 m/s  
39
Optical Properties
  
  
Refractive Index
1.38  
40
2.00  
15
Reflectivity
80.00 %  
7
71.00 %  
12
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
U  
Hf  
Isotopes
  
  
Known Isotopes
25  
14
32  
7
Electronegativity
  
  
Pauling Electronegativity
1.38  
29
1.30  
33
Sanderson Electronegativity
1.38  
22
1.30  
25
Allred Rochow Electronegativity
1.22  
27
1.23  
26
Mulliken-Jaffe Electronegativity
1.38  
29
1.30  
33
Allen Electronegativity
1.38  
36
1.16  
99+
Electropositivity
  
  
Pauling Electropositivity
2.62  
26
2.70  
22
Ionization Energies
  
  
1st Energy Level
597.60 kJ/mol  
99+
658.50 kJ/mol  
40
2nd Energy Level
1,420.00 kJ/mol  
99+
1,440.00 kJ/mol  
99+
3rd Energy Level
1,900.00 kJ/mol  
99+
2,250.00 kJ/mol  
99+
4th Energy Level
3,145.00 kJ/mol  
99+
3,216.00 kJ/mol  
99+
5th Energy Level
5,976.00 kJ/mol  
99+
6,585.00 kJ/mol  
33
6th Energy Level
5,976.00 kJ/mol  
99+
6,585.00 kJ/mol  
99+
7th Energy level
5,970.00 kJ/mol  
99+
6,580.00 kJ/mol  
99+
8th Energy Level
5,976.00 kJ/mol  
99+
6,580.00 kJ/mol  
99+
9th Energy Level
5,976.00 kJ/mol  
99+
6,585.00 kJ/mol  
38
10th Energy Level
5,976.00 kJ/mol  
99+
6,590.00 kJ/mol  
40
11th Energy Level
5,976.00 kJ/mol  
99+
6,585.00 kJ/mol  
40
12th Energy Level
5,970.00 kJ/mol  
99+
6,580.00 kJ/mol  
99+
13th Energy Level
5,970.00 kJ/mol  
99+
6,580.00 kJ/mol  
35
14th Energy Level
5,970.00 kJ/mol  
34
658.50 kJ/mol  
99+
15th Energy Level
59,700.00 kJ/mol  
99+
65,800.00 kJ/mol  
34
16th Energy Level
59,700.00 kJ/mol  
35
658.50 kJ/mol  
99+
17th Energy Level
597.60 kJ/mol  
99+
658.50 kJ/mol  
99+
18th Energy Level
5,976.00 kJ/mol  
99+
6,585.00 kJ/mol  
36
19th Energy Level
597.60 kJ/mol  
99+
658.50 kJ/mol  
99+
20th Energy Level
597.00 kJ/mol  
99+
658.00 kJ/mol  
37
21st Energy Level
597.60 kJ/mol  
99+
658.50 kJ/mol  
99+
22nd Energy Level
597.00 kJ/mol  
99+
658.00 kJ/mol  
31
23rd Energy Level
597.60 kJ/mol  
99+
658.50 kJ/mol  
99+
24th Energy Level
597.60 kJ/mol  
99+
658.50 kJ/mol  
31
25th Energy Level
597.60 kJ/mol  
99+
658.00 kJ/mol  
33
26th Energy Level
597.60 kJ/mol  
99+
658.50 kJ/mol  
32
27th Energy Level
597.60 kJ/mol  
99+
658.50 kJ/mol  
33
28th Energy Level
597.60 kJ/mol  
99+
658.50 kJ/mol  
38
29th Energy Level
597.60 kJ/mol  
99+
658.50 kJ/mol  
39
30th Energy Level
597.60 kJ/mol  
99+
658.00 kJ/mol  
35
Electrochemical Equivalent
1.48 g/amp-hr  
99+
1.66 g/amp-hr  
99+
Electron Work Function
3.63 eV  
99+
3.90 eV  
36
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
92  
26
72  
99+
Electron Configuration
[Rn] 5f3 6d1 7s2  
[Xe] 4f14 5d2 6s2  
Crystal Structure
Orthorhombic (ORTH)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
ORTH-Crystal-Structure-of-Uranium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
92  
26
72  
99+
Number of Neutrons
146  
14
106  
30
Number of Electrons
92  
26
72  
99+
Radius of an Atom
  
  
Atomic Radius
156.00 pm  
31
159.00 pm  
30
Covalent Radius
196.00 pm  
14
175.00 pm  
25
Van der Waals Radius
186.00 pm  
40
200.00 pm  
35
Atomic Weight
238.03 amu  
21
178.49 amu  
39
Atomic Volume
12.59 cm3/mol  
99+
13.60 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Protactinium
  
Lutetium
  
Next Element
Neptunium
  
Tantalum
  
Valence Electron Potential
170.00 (-eV)  
4
81.00 (-eV)  
16
Lattice Constant
295.08 pm  
99+
319.64 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.02  
99+
1.58  
34
Mechanical
Density
  
  
Density At Room Temperature
19.10 g/cm3  
17
13.31 g/cm3  
27
Density When Liquid (at m.p.)
17.30 g/cm3  
17
12.00 g/cm3  
31
Tensile Strength
100.00 MPa  
28
445.00 MPa  
9
Viscosity
0.00  
21
0.00  
28
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.01 (Pa)  
20
0.00 (Pa)  
25
Elasticity properties
  
  
Shear Modulus
111.00 GPa  
10
30.00 GPa  
27
Bulk Modulus
100.00 GPa  
16
110.00 GPa  
15
Young's Modulus
208.00 GPa  
11
78.00 GPa  
27
Poisson Ratio
0.23  
30
0.37  
7
Other Mechanical Properties
Ductile, Malleable  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
18.80  
19
13.31  
30
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
16
0.00 H/m  
9
Susceptibility
0.00  
24
0.00  
13
Electrical Properties
  
  
Electrical Property
Poor Conductor  
Conductor  
Resistivity
0.28 nΩ·m  
99+
331.00 nΩ·m  
14
Electrical Conductivity
0.04 106/cm Ω  
99+
0.03 106/cm Ω  
99+
Electron Affinity
50.60 kJ/mol  
25
0.00 kJ/mol  
99+
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.14 J/(kg K)  
38
Molar Heat Capacity
27.67 J/mol·K  
18
25.73 J/mol·K  
99+
Thermal Conductivity
27.50 W/m·K  
99+
23.00 W/m·K  
99+
Critical Temperature
1,405.00 K  
99+
2,500.00 K  
11
Thermal Expansion
13.90 µm/(m·K)  
30
5.90 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
477.00 kJ/mol  
18
661.10 kJ/mol  
6
Enthalpy of Fusion
15.48 kJ/mol  
19
25.10 kJ/mol  
8
Enthalpy of Atomization
489.50 kJ/mol  
18
703.00 kJ/mol  
5
Standard Molar Entropy
50.20 J/mol.K  
99+
43.60 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!