Osmium Uranium Comparison
Periodic Table
Symbol
Os
U
Group Number
8
10
0
18
Period Number
6
7
Block
d block
f block
Element Family
Transition Metal
Actinide
CAS Number
7440042
99+
7440611
28
Space Group Name
P63/mmc
Cmcm
Space Group Number
194.00
5
63.00
10
Facts
Interesting Facts
- Osmium metal does not oxidize in air unless it is heated.
- But if it heated den it forms Osmium Tetroxide, which is highly toxic.
- Major mining countries of Uranium include Russia, Australia, Namibia, Canada and Niger and total 33% Uranium are mine in Kazakhstan.
Sources
Found As a By-product, Found in Minerals, Mining
Earth's crust, Mining, Ores of Minerals
History
Who Discovered
Smithson Tennant
Not Available
Discovery
In 1803
In 1789
Abundance
Abundance In Universe
3 * 10-7 %
21
2 * 10-8 %
29
Abundance In Sun
~0.0000002 %
25
~0.0000001 %
26
Abundance In Meteorites
0.00 %
28
0.00 %
99+
Abundance In Earth's Crust
0.00 %
99+
0.00 %
36
Abundance In Oceans
Not Available
0.00 %
11
Uses
Uses & Benefits
- Its has very limited uses and its alloys are very hard and are used in the manufacturing of pen tips, pivots, needles and electrical contacts.
- It is also used as industrial catalyst to speed up the chemical reaction.
- 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.
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
Ammunition Industry, Chemical Industry
Medical Uses
NA
NA
Other Uses
Alloys
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues
Biological Properties
Toxicity
Highly Toxic
Toxic
Present in Human Body
No
No
Physical Properties
Melting Point
3,045.00 °C
3
1,132.00 °C
39
Boiling Point
5,027.00 °C
6
3,818.00 °C
16
Appearance
Physical State
Solid
Solid
Color
Silvery Bluish-Gray
Silvery Gray
Luster
Metallic
Metallic
Hardness
Mohs Hardness
7.00
3
6.00
6
Brinell Hardness
3,490.00 MPa
1
2,350.00 MPa
2
Vickers Hardness
Not Available
1,960.00 MPa
2
Speed of Sound
4,940.00 m/s
11
3,155.00 m/s
25
Optical Properties
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
Os
U
Isotopes
Known Isotopes
35
4
25
14
Electronegativity
Pauling Electronegativity
2.20
4
1.38
28
Allred Rochow Electronegativity
1.52
12
1.22
26
Allen Electronegativity
1.65
19
Not Available
Electropositivity
Pauling Electropositivity
1.80
99+
2.62
26
Ionization Energies
1st Energy Level
840.00 kJ/mol
12
597.60 kJ/mol
99+
2nd Energy Level
1,309.80 kJ/mol
99+
1,420.00 kJ/mol
99+
3rd Energy Level
1,600.00 kJ/mol
99+
1,900.00 kJ/mol
99+
4th Energy Level
Not Available
3,145.00 kJ/mol
99+
Electrochemical Equivalent
1.77 g/amp-hr
38
1.48 g/amp-hr
99+
Electron Work Function
4.83 eV
8
3.63 eV
30
Other Chemical Properties
Chemical Stability, Ionization, Solubility
Ionization, Radioactive Isotopes, Radioactivity
Atomic Properties
Atomic Number
76
40
92
26
Electron Configuration
[Xe] 4f14 5d6 6s2
[Rn] 5f3 6d1 7s2
Crystal Structure
Hexagonal Close Packed (HCP)
Orthorhombic (ORTH)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
ORTH-Crystal-Structure-of-Uranium.jpg#100
Atom
Number of Protons
76
39
92
26
Number of Neutrons
114
25
146
13
Number of Electrons
76
39
92
26
Radius of an Atom
Atomic Radius
133.80 pm
99+
156.00 pm
29
Covalent Radius
Not Available
196.00 pm
14
Van der Waals Radius
216.00 pm
24
186.00 pm
33
Atomic Weight
190.23 amu
35
238.03 amu
21
Atomic Volume
8.49 cm3/mol
99+
12.59 cm3/mol
40
Adjacent Atomic Numbers
Valence Electron Potential
91.40 (-eV)
12
170.00 (-eV)
4
Lattice Constant
273.44 pm
99+
295.08 pm
99+
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
Lattice C/A Ratio
1.58
14
Not Available
Mechanical Properties
Density
Density At Room Temperature
22.59 g/cm3
9
19.10 g/cm3
17
Density When Liquid (at m.p.)
20.00 g/cm3
1
17.30 g/cm3
7
Tensile Strength
1,000.00 MPa
4
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
0.00 (Pa)
28
0.01 (Pa)
20
Elasticity properties
Shear Modulus
222.00 GPa
1
111.00 GPa
10
Bulk Modulus
462.00 GPa
1
100.00 GPa
16
Young's Modulus
Not Available
208.00 GPa
10
Poisson Ratio
0.25
24
0.23
30
Other Mechanical Properties
Ductile
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
22.57
2
18.80
10
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Poor Conductor
Resistivity
81.20 nΩ·m
35
0.28 nΩ·m
99+
Electrical Conductivity
0.11 106/cm Ω
18
0.04 106/cm Ω
37
Electron Affinity
106.10 kJ/mol
9
Not Available
Thermal Properties
Specific Heat
0.13 J/(kg K)
39
0.12 J/(kg K)
40
Molar Heat Capacity
24.70 J/mol·K
99+
27.67 J/mol·K
15
Thermal Conductivity
87.60 W/m·K
19
27.50 W/m·K
40
Critical Temperature
Not Available
Not Available
Thermal Expansion
5.10 µm/(m·K)
99+
13.90 µm/(m·K)
27
Enthalpy
Enthalpy of Vaporization
627.60 kJ/mol
7
477.00 kJ/mol
13
Enthalpy of Fusion
29.30 kJ/mol
4
15.48 kJ/mol
19
Enthalpy of Atomization
669.00 kJ/mol
6
489.50 kJ/mol
14
Standard Molar Entropy
32.60 J/mol.K
99+
50.20 J/mol.K
31
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