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Osmium
Osmium

Iridium
Iridium



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Osmium vs Iridium

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1 Periodic Table
1.1 Symbol
Os
Ir
1.2 Group Number
89
Gadolinium
0 17
1.3 Period Number
66
Lithium
2 7
1.4 Block
d block
d block
1.5 Element Family
Transition Metal
Transition Metal
1.6 CAS Number
74400427439885
Aluminium
7429905 54386242
1.7 Space Group Name
P63/mmc
Fm_ 3m
1.8 Space Group Number
194.00225.00
Plutonium
11 229
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
3 * 10-7 %2 * 10-7 %
Thallium
5E-09 0.11
2.4.2 Abundance In Sun
~0.0000002 %~0.0000002 %
Beryllium
1E-08 0.1
2.4.3 Abundance In Meteorites
0.00 %0.00 %
Gold
1.7E-07 22
2.4.4 Abundance In Earth's Crust
0.00 %0.00 %
Radium
9.9E-12 8.1
2.4.5 Abundance In Oceans
NANA
Protactinium
2E-23 1.1
2.4.6 Abundance In Humans
NANA
Radium
1E-13 1.4
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
3.2.3 In Blood
NANA
Plutonium
0 1970
3.2.4 In Bone
NANA
Plutonium
0 170000
4 Physical
4.1 Melting Point
3,045.00 °C2,410.00 °C
Francium
27 3410
4.2 Boiling Point
5,027.00 °C4,527.00 °C
Flerovium
147 5660
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
7.006.50
Cesium
0.2 8.5
4.4.2 Brinell Hardness
3,490.00 MPa1,670.00 MPa
Cesium
0.14 3490
4.4.3 Vickers Hardness
NA1,760.00 MPa
Palladium
121 3430
4.5 Speed of Sound
4,940.00 m/s4,825.00 m/s
Thallium
818 16200
4.6 Optical Properties
4.6.1 Refractive Index
NANA
Mercury
1.000933 1.7229
4.6.2 Reflectivity
NA78.00 %
Molybdenum
58 97
4.7 Allotropes
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
3534
Tennessine
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
2.202.20
Francium
0.7 2.54
5.3.2 Sanderson Electronegativity
NANA
Cesium
0.22 2.56
5.3.3 Allred Rochow Electronegativity
1.521.55
Cesium
0.86 1.82
5.3.4 Mulliken-Jaffe Electronegativity
NANA
Cesium
0.62 2.48
5.3.5 Allen Electronegativity
1.651.68
Cesium
0.659 2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
1.801.80
Gold
1.46 3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
840.00 kJ/mol880.00 kJ/mol
Cesium
375.7 26130
5.5.2 2nd Energy Level
1,309.80 kJ/mol1,600.00 kJ/mol
Ruthenium
710.2162 28750
5.5.3 3rd Energy Level
1,600.00 kJ/molNA
Tin
1600 34230
5.5.4 4th Energy Level
NANA
Thorium
2780 37066
5.5.5 5th Energy Level
NANA
Dubnium
4305.2 97510
5.5.6 6th Energy Level
NANA
Seaborgium
5715.8 105800
5.5.7 7th Energy level
NANA
Bohrium
7226.8 114300
5.5.8 8th Energy Level
NANA
Hassium
8857.4 125300
5.5.9 9th Energy Level
NANA
Yttrium
14110 134700
5.5.10 10th Energy Level
NANA
Strontium
17100 144300
5.5.11 11th Energy Level
NANA
Yttrium
19900 169988
5.5.12 12th Energy Level
NANA
Molybdenum
22219 189368
5.5.13 13th Energy Level
NANA
Molybdenum
26930 76015
5.5.14 14th Energy Level
NANA
Molybdenum
29196 86450
5.5.15 15th Energy Level
NANA
Manganese
41987 97510
5.5.16 16th Energy Level
NANA
Iron
47206 109480
5.5.17 17th Energy Level
NANA
Cobalt
52737 122200
5.5.18 18th Energy Level
NANA
Nickel
58570 134810
5.5.19 19th Energy Level
NANA
Copper
64702 148700
5.5.20 20th Energy Level
NANA
Molybdenum
80400 171200
5.5.21 21st Energy Level
NANA
Molybdenum
87000 179100
5.5.22 22nd Energy Level
NANA
Molybdenum
93400 184900
5.5.23 23rd Energy Level
NANA
Molybdenum
98420 198800
5.5.24 24th Energy Level
NANA
Molybdenum
104400 195200
5.5.25 25th Energy Level
NANA
Molybdenum
121900 121900
5.5.26 26th Energy Level
NANA
Molybdenum
127700 127700
5.5.27 27th Energy Level
NANA
Molybdenum
133800 133800
5.5.28 28th Energy Level
NANA
Molybdenum
139800 139800
5.5.29 29th Energy Level
NANA
Molybdenum
148100 148100
5.5.30 30th Energy Level
NANA
Molybdenum
154500 154500
5.6 Electrochemical Equivalent
1.77 g/amp-hr1.14 g/amp-hr
Beryllium
0.16812 8.3209
5.7 Electron Work Function
4.83 eV4.55 eV
Cesium
2.14 5.65
5.8 Other Chemical Properties
Chemical Stability, Ionization, Solubility
Flammable, Ionization, Radioactive Isotopes, Radioactivity
6 Atomic
6.1 Atomic Number
7677
Lithium
3 117
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
7674
Lithium
3 117
6.4.2 Number of Neutrons
114110
Lithium
4 184
6.4.3 Number of Electrons
7674
Lithium
3 117
6.5 Radius of an Atom
6.5.1 Atomic Radius
133.80 pm136.00 pm
Beryllium
112 265
6.5.2 Covalent Radius
NA141.00 pm
Beryllium
96 260
6.5.3 Van der Waals Radius
216.00 pm202.00 pm
Zinc
139 348
6.6 Atomic Weight
190.23 amu192.22 amu
Lithium
6.94 294
6.7 Atomic Volume
8.49 cm3/mol9.53 cm3/mol
Manganese
1.39 71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
91.40 (-eV)140.00 (-eV)
Francium
8 392.42
6.10 Lattice Constant
273.44 pm383.90 pm
Beryllium
228.58 891.25
6.11 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
6.12 Lattice C/A Ratio
1.58NA
Beryllium
1.567 1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
22.59 g/cm322.56 g/cm3
Lithium
0.534 40.7
7.1.2 Density When Liquid (at m.p.)
20.00 g/cm319.00 g/cm3
Lithium
0.512 20
7.2 Tensile Strength
1,000.00 MPa2,000.00 MPa
Indium
2.5 11000
7.3 Viscosity
NANA
Mercury
0.001526 0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
NANA
Cerium
2.47E-11 121
7.4.2 Vapor Pressure at 2000 K
0.00 (Pa)0.00 (Pa)
Tungsten
2.62E-10 774
7.5 Elasticity properties
7.5.1 Shear Modulus
222.00 GPa210.00 GPa
Potassium
1.3 222
7.5.2 Bulk Modulus
462.00 GPa320.00 GPa
Cesium
1.6 462
7.5.3 Young's Modulus
NA528.00 GPa
Cesium
1.7 528
7.6 Poisson Ratio
0.250.26
Beryllium
0.032 0.47
7.7 Other Mechanical Properties
Ductile
NA
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
22.5721.78
Lithium
0.53 4500
8.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
8.1.3 Permeability
NANA
Bismuth
1.25643E-06 0.0063
8.1.4 Susceptibility
NANA
Bismuth
-0.000166 200000
8.2 Electrical Properties
8.2.1 Electrical Property
Conductor
Conductor
8.2.2 Resistivity
81.20 nΩ·m47.10 nΩ·m
Thallium
0.18 961
8.2.3 Electrical Conductivity
0.11 106/cm Ω0.19 106/cm Ω
Plutonium
0.00666 0.63
8.2.4 Electron Affinity
106.10 kJ/mol151.00 kJ/mol
Mercury
0 222.8
9 Thermal
9.1 Specific Heat
0.13 J/(kg K)0.13 J/(kg K)
Americium
0.11 3.6
9.2 Molar Heat Capacity
24.70 J/mol·K25.10 J/mol·K
Beryllium
16.443 62.7
9.3 Thermal Conductivity
87.60 W/m·K147.00 W/m·K
Neptunium
6.3 429
9.4 Critical Temperature
NANA
Ytterbium
26.3 3223
9.5 Thermal Expansion
5.10 µm/(m·K)6.40 µm/(m·K)
Tungsten
4.5 97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
627.60 kJ/mol799.10 kJ/mol
Zinc
7.32 799.1
9.6.2 Enthalpy of Fusion
29.30 kJ/mol35.23 kJ/mol
Cesium
2.1 35.23
9.6.3 Enthalpy of Atomization
669.00 kJ/mol837.00 kJ/mol
Mercury
61.5 837
9.7 Standard Molar Entropy
32.60 J/mol.K35.50 J/mol.K
Beryllium
9.5 198.1