Symbol
Os
  
U
  
Period Number
6
  
7
  
Block
d block
  
f block
  
Element Family
Transition Metal
  
Actinide
  
Space Group Name
P63/mmc
  
Cmcm
  
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 Sun
~0.0000002 %
  
25
~0.0000001 %
  
26
Abundance In Earth's Crust
Abundance In Oceans
Not Available
  
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
  
Melting Point
1,132.00 °C
  
39
Boiling Point
3,818.00 °C
  
16
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silvery Bluish-Gray
  
Silvery Gray
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
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 Formula
Os
  
U
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Allred Rochow Electronegativity
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
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+
Other Chemical Properties
Chemical Stability, Ionization, Solubility
  
Ionization, Radioactive Isotopes, Radioactivity
  
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
  
  
Radius of an Atom
  
  
Covalent Radius
Not Available
  
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 Angles
π/2, π/2, 2 π/3
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Density
  
  
Density At Room Temperature
19.10 g/cm3
  
17
Density When Liquid (at m.p.)
Tensile Strength
1,000.00 MPa
  
4
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Elasticity properties
  
  
Young's Modulus
Not Available
  
Other Mechanical Properties
Ductile
  
Ductile, Malleable
  
Magnetic Characteristics
  
  
Magnetic Ordering
Paramagnetic
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Poor Conductor
  
Electrical Conductivity
0.11 106/cm Ω
  
18
0.04 106/cm Ω
  
37
Electron Affinity
106.10 kJ/mol
  
9
Not Available
  
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