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Osmium
Osmium

Iridium
Iridium



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Osmium
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Iridium

Osmium vs Iridium

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1 Periodic Table
1.1 Symbol
Os
Ir
1.2 Group Number
Tennessine
8
Rank: 10 (Overall)
9
Rank: 9 (Overall)
Gadolinium
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1.3 Period Number
Uranium
6
Rank: 2 (Overall)
6
Rank: 2 (Overall)
Lithium
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1.4 Block
d block
d block
1.5 Element Family
Transition Metal
Transition Metal
1.6 CAS Number
Roentgenium
7440042
Rank: 75 (Overall)
7439885
Rank: 89 (Overall)
Aluminium
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1.7 Space Group Name
P63/mmc
Fm_ 3m
1.8 Space Group Number
Sodium
194.00
Rank: 5 (Overall)
225.00
Rank: 2 (Overall)
Plutonium
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2 Facts
2.1 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.
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
2.2 Sources
Found As a By-product, Found in Minerals, Mining
Found in Minerals, Mining, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Smithson Tennant
Smithson Tennant
2.3.2 Discovery
In 1803
In 1803
2.4 Abundance
2.4.1 Abundance In Universe
Iron
3 * 10-7 %
Rank: 21 (Overall)
2 * 10-7 %
Rank: 22 (Overall)
Thallium
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2.4.2 Abundance In Sun
Iron
~0.0000002 %
Rank: 25 (Overall)
~0.0000002 %
Rank: 25 (Overall)
Beryllium
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2.4.3 Abundance In Meteorites
Iron
0.00 %
Rank: 28 (Overall)
0.00 %
Rank: 29 (Overall)
Gold
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2.4.4 Abundance In Earth's Crust
Aluminium
0.00 %
Rank: 53 (Overall)
0.00 %
Rank: 56 (Overall)
Radium
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2.4.5 Abundance In Oceans
Sodium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Protactinium
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2.4.6 Abundance In Humans
Calcium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Radium
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3 Uses
3.1 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.
  • 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.
3.1.1 Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
Automobile Industry, Electrical Industry, Electronic Industry
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
Alloys
Alloys
3.2 Biological Properties
3.2.1 Toxicity
Highly Toxic
Toxic
3.2.2 Present in Human Body
60% Transition Metals Metals have it !
60% Transition Metals Metals have it !
3.2.3 In Blood
Sodium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Plutonium
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3.2.4 In Bone
Calcium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Plutonium
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4 Physical
4.1 Melting Point
Tungsten
3,045.00 °C
Rank: 3 (Overall)
2,410.00 °C
Rank: 7 (Overall)
Francium
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4.2 Boiling Point
Tungsten
5,027.00 °C
Rank: 6 (Overall)
4,527.00 °C
Rank: 10 (Overall)
Flerovium
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4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silvery Bluish-Gray
Silvery White
4.3.3 Luster
Metallic
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
Chromium
7.00
Rank: 3 (Overall)
6.50
Rank: 5 (Overall)
Cesium
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4.4.2 Brinell Hardness
Osmium
3,490.00 MPa
Rank: 1 (Overall)
1,670.00 MPa
Rank: 5 (Overall)
Cesium
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4.4.3 Vickers Hardness
Tungsten
Not Available
Rank: N/A (Overall)
1,760.00 MPa
Rank: 3 (Overall)
Palladium
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4.5 Speed of Sound
Technetium
4,940.00 m/s
Rank: 11 (Overall)
4,825.00 m/s
Rank: 13 (Overall)
Thallium
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4.6 Optical Properties
4.6.1 Refractive Index
Palladium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury
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4.6.2 Reflectivity
Silver
Not Available
Rank: N/A (Overall)
78.00 %
Rank: 6 (Overall)
Molybdenum
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4.7 Allotropes
6% Transition Metals Metals have it !
6% Transition Metals Metals have it !
4.7.1 α Allotropes
Not Available
Not Available
4.7.2 β Allotropes
Not Available
Not Available
4.7.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
Os
Ir
5.2 Isotopes
5.2.1 Known Isotopes
Palladium
35
Rank: 4 (Overall)
34
Rank: 5 (Overall)
Tennessine
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5.3 Electronegativity
5.3.1 Pauling Electronegativity
Gold
2.20
Rank: 4 (Overall)
2.20
Rank: 4 (Overall)
Francium
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5.3.2 Sanderson Electronegativity
Cobalt
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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5.3.3 Allred Rochow Electronegativity
Gallium
1.52
Rank: 12 (Overall)
1.55
Rank: 11 (Overall)
Cesium
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5.3.4 Mulliken-Jaffe Electronegativity
Polonium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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5.3.5 Allen Electronegativity
Berkelium
1.65
Rank: 19 (Overall)
1.68
Rank: 17 (Overall)
Cesium
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5.4 Electropositivity
5.4.1 Pauling Electropositivity
Francium
1.80
Rank: 49 (Overall)
1.80
Rank: 49 (Overall)
Gold
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5.5 Ionization Energies
5.5.1 1st Energy Level
Chromium
840.00 kJ/mol
Rank: 12 (Overall)
880.00 kJ/mol
Rank: 9 (Overall)
Cesium
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5.5.2 2nd Energy Level
Chromium
1,309.80 kJ/mol
Rank: 53 (Overall)
1,600.00 kJ/mol
Rank: 35 (Overall)
Ruthenium
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5.5.3 3rd Energy Level
Chromium
1,600.00 kJ/mol
Rank: 82 (Overall)
Not Available
Rank: N/A (Overall)
Osmium
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5.5.4 4th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Thorium
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5.5.5 5th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Dubnium
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5.5.6 6th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Seaborgium
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5.5.7 7th Energy level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bohrium
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5.5.8 8th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Hassium
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5.5.9 9th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium
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5.5.10 10th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Strontium
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5.5.11 11th Energy Level
Magnesium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium
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5.5.12 12th Energy Level
Magnesium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.13 13th Energy Level
Titanium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.14 14th Energy Level
Vanadium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.15 15th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Manganese
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5.5.16 16th Energy Level
Manganese
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Iron
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5.5.17 17th Energy Level
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cobalt
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5.5.18 18th Energy Level
Cobalt
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Nickel
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5.5.19 19th Energy Level
Nickel
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Copper
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5.5.20 20th Energy Level
Zinc
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.21 21st Energy Level
Zinc
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.22 22nd Energy Level
Copper
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.23 23rd Energy Level
Copper
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.24 24th Energy Level
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.25 25th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.26 26th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.27 27th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.28 28th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.29 29th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.30 30th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.6 Electrochemical Equivalent
Francium
1.77 g/amp-hr
Rank: 38 (Overall)
1.14 g/amp-hr
Rank: 54 (Overall)
Beryllium
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5.7 Electron Work Function
Platinum
4.83 eV
Rank: 8 (Overall)
4.55 eV
Rank: 13 (Overall)
Cesium
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5.8 Other Chemical Properties
Chemical Stability, Ionization, Solubility
Flammable, Ionization, Radioactive Isotopes, Radioactivity
6 Atomic
6.1 Atomic Number
Tennessine
76
Rank: 40 (Overall)
77
Rank: 39 (Overall)
Lithium
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6.2 Electron Configuration
[Xe] 4f14 5d6 6s2
[Xe] 4f14 5d7 6s2
6.3 Crystal Structure
Hexagonal Close Packed (HCP)
Face Centered Cubic (FCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
Tennessine
76
Rank: 39 (Overall)
74
Rank: 41 (Overall)
Lithium
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6.4.2 Number of Neutrons
Flerovium
114
Rank: 25 (Overall)
110
Rank: 27 (Overall)
Lithium
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6.4.3 Number of Electrons
Tennessine
76
Rank: 39 (Overall)
74
Rank: 41 (Overall)
Lithium
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6.5 Radius of an Atom
6.5.1 Atomic Radius
Cesium
133.80 pm
Rank: 44 (Overall)
136.00 pm
Rank: 41 (Overall)
Beryllium
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6.5.2 Covalent Radius
Francium
Not Available
Rank: N/A (Overall)
141.00 pm
Rank: 43 (Overall)
Beryllium
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6.5.3 Van der Waals Radius
Francium
216.00 pm
Rank: 24 (Overall)
202.00 pm
Rank: 27 (Overall)
Zinc
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6.6 Atomic Weight
Tennessine
190.23 amu
Rank: 35 (Overall)
192.22 amu
Rank: 34 (Overall)
Lithium
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6.7 Atomic Volume
Cesium
8.49 cm3/mol
Rank: 58 (Overall)
9.53 cm3/mol
Rank: 50 (Overall)
Manganese
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6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
Platinum
91.40 (-eV)
Rank: 12 (Overall)
140.00 (-eV)
Rank: 5 (Overall)
Francium
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6.10 Lattice Constant
Manganese
273.44 pm
Rank: 66 (Overall)
383.90 pm
Rank: 26 (Overall)
Beryllium
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6.11 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
6.12 Lattice C/A Ratio
Cadmium
1.58
Rank: 14 (Overall)
Not Available
Rank: N/A (Overall)
Beryllium
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7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
Hassium
22.59 g/cm3
Rank: 9 (Overall)
22.56 g/cm3
Rank: 10 (Overall)
Lithium
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7.1.2 Density When Liquid (at m.p.)
Osmium
20.00 g/cm3
Rank: 1 (Overall)
19.00 g/cm3
Rank: 3 (Overall)
Lithium
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7.2 Tensile Strength
Iron
1,000.00 MPa
Rank: 4 (Overall)
2,000.00 MPa
Rank: 2 (Overall)
Indium
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7.3 Viscosity
Mercury
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
Strontium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cerium
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7.4.2 Vapor Pressure at 2000 K
Chromium
0.00 (Pa)
Rank: 28 (Overall)
0.00 (Pa)
Rank: 25 (Overall)
Tungsten
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7.5 Elasticity properties
7.5.1 Shear Modulus
Osmium
222.00 GPa
Rank: 1 (Overall)
210.00 GPa
Rank: 2 (Overall)
Potassium
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7.5.2 Bulk Modulus
Osmium
462.00 GPa
Rank: 1 (Overall)
320.00 GPa
Rank: 3 (Overall)
Cesium
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7.5.3 Young's Modulus
Iridium
Not Available
Rank: N/A (Overall)
528.00 GPa
Rank: 1 (Overall)
Cesium
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7.6 Poisson Ratio
Gallium
0.25
Rank: 24 (Overall)
0.26
Rank: 22 (Overall)
Beryllium
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7.7 Other Mechanical Properties
Ductile
NA
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
Cobalt
22.57
Rank: 2 (Overall)
21.78
Rank: 3 (Overall)
Lithium
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8.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
8.1.3 Permeability
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth
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8.1.4 Susceptibility
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth
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8.2 Electrical Properties
8.2.1 Electrical Property
Conductor
Conductor
8.2.2 Resistivity
Mercury
81.20 nΩ·m
Rank: 35 (Overall)
47.10 nΩ·m
Rank: 44 (Overall)
Thallium
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8.2.3 Electrical Conductivity
Silver
0.11 106/cm Ω
Rank: 18 (Overall)
0.19 106/cm Ω
Rank: 10 (Overall)
Plutonium
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8.2.4 Electron Affinity
Gold
106.10 kJ/mol
Rank: 9 (Overall)
151.00 kJ/mol
Rank: 4 (Overall)
Mercury
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9 Thermal
9.1 Specific Heat
Lithium
0.13 J/(kg K)
Rank: 39 (Overall)
0.13 J/(kg K)
Rank: 39 (Overall)
Americium
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9.2 Molar Heat Capacity
Americium
24.70 J/mol·K
Rank: 49 (Overall)
25.10 J/mol·K
Rank: 43 (Overall)
Beryllium
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9.3 Thermal Conductivity
Silver
87.60 W/m·K
Rank: 19 (Overall)
147.00 W/m·K
Rank: 10 (Overall)
Neptunium
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9.4 Critical Temperature
Lithium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Ytterbium
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9.5 Thermal Expansion
Cesium
5.10 µm/(m·K)
Rank: 56 (Overall)
6.40 µm/(m·K)
Rank: 51 (Overall)
Tungsten
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9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
Tungsten
627.60 kJ/mol
Rank: 7 (Overall)
799.10 kJ/mol
Rank: 1 (Overall)
Zinc
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9.6.2 Enthalpy of Fusion
Tungsten
29.30 kJ/mol
Rank: 4 (Overall)
35.23 kJ/mol
Rank: 1 (Overall)
Cesium
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9.6.3 Enthalpy of Atomization
Tungsten
669.00 kJ/mol
Rank: 6 (Overall)
837.00 kJ/mol
Rank: 1 (Overall)
Mercury
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9.7 Standard Molar Entropy
Protactinium
32.60 J/mol.K
Rank: 47 (Overall)
35.50 J/mol.K
Rank: 43 (Overall)
Beryllium
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