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Platinum vs Osmium

Platinum
Osmium
Osmium vs Platinum


Periodic Table
Symbol
Pt  
Os  
Group Number
10  
8
8  
10
Period Number
6  
6  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440064  
99+
7440042  
99+
Space Group Name
Fm_ 3m  
P63/mmc  
Space Group Number
225.00  
2
194.00  
5
Facts
Interesting Facts
  • Platinum is the rarest metal from the Precious metal categories..
  • Commercially Platinum is produced as a byproduct in ores of nickel.
  
  • Osmium metal does not oxidize in air unless it is heated.
  • But if it heated den it forms Osmium Tetroxide, which is highly toxic.
  
Sources
Mining, Ores of metals, Ores of Minerals  
Found As a By-product, Found in Minerals, Mining  
History
  
  
Who Discovered
Antonio de Ulloa  
Smithson Tennant  
Discovery
In 1735  
In 1803  
Abundance
  
  
Abundance In Universe
5 * 10-7 %  
19
3 * 10-7 %  
21
Abundance In Sun
~0.0000009 %  
19
~0.0000002 %  
25
Abundance In Meteorites
0.00 %  
25
0.00 %  
28
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Uses
Uses & Benefits
  • Platinum metal is mainly used in jewellery.
  • Platinum is used as an industrial catalyst in production of nitric acid, silicone and benzene.
  
  • 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.
  
Industrial Uses
Aerospace Industry, Chemical Industry  
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing  
NA  
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
Highly Toxic  
Present in Human Body
No  
No  
Physical Properties
Melting Point
1,772.00 °C  
16
3,045.00 °C  
3
Boiling Point
3,827.00 °C  
15
5,027.00 °C  
6
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery Bluish-Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
3.50  
11
7.00  
3
Brinell Hardness
300.00 MPa  
34
3,490.00 MPa  
1
Vickers Hardness
400.00 MPa  
25
Not Available  
Speed of Sound
2,800.00 m/s  
29
4,940.00 m/s  
11
Optical Properties
  
  
Reflectivity
73.00 %  
8
Not Available  
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
Pt  
Os  
Isotopes
  
  
Known Isotopes
35  
4
35  
4
Electronegativity
  
  
Pauling Electronegativity
2.28  
3
2.20  
4
Allred Rochow Electronegativity
1.44  
17
1.52  
12
Allen Electronegativity
1.72  
16
1.65  
19
Electropositivity
  
  
Pauling Electropositivity
1.72  
99+
1.80  
99+
Ionization Energies
  
  
1st Energy Level
870.00 kJ/mol  
10
840.00 kJ/mol  
12
2nd Energy Level
1,791.00 kJ/mol  
21
1,309.80 kJ/mol  
99+
3rd Energy Level
Not Available  
1,600.00 kJ/mol  
99+
Electrochemical Equivalent
1.82 g/amp-hr  
35
1.77 g/amp-hr  
38
Electron Work Function
5.65 eV  
1
4.83 eV  
8
Other Chemical Properties
Chemical Stability, Anti Corrosion, Ionization  
Chemical Stability, Ionization, Solubility  
Atomic Properties
Atomic Number
78  
38
76  
40
Electron Configuration
[Xe] 4f14 5d9 6s1  
[Xe] 4f14 5d6 6s2  
Crystal Structure
Face Centered Cubic (FCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Platinum.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
78  
38
76  
39
Number of Neutrons
117  
24
114  
25
Number of Electrons
78  
38
76  
39
Radius of an Atom
  
  
Atomic Radius
139.00 pm  
39
133.80 pm  
99+
Covalent Radius
136.00 pm  
99+
Not Available  
Van der Waals Radius
175.00 pm  
36
216.00 pm  
24
Atomic Weight
47.87 amu  
99+
190.23 amu  
35
Atomic Volume
9.09 cm3/mol  
99+
8.49 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Iridium
  
Rhenium
  
Next Element
Gold
  
Iridium
  
Valence Electron Potential
392.42 (-eV)  
1
91.40 (-eV)  
12
Lattice Constant
392.42 pm  
24
273.44 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
Not Available  
1.58  
14
Mechanical Properties
Density
  
  
Density At Room Temperature
21.45 g/cm3  
11
22.59 g/cm3  
9
Density When Liquid (at m.p.)
19.77 g/cm3  
2
20.00 g/cm3  
1
Tensile Strength
125.00 MPa  
14
1,000.00 MPa  
4
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.07 (Pa)  
18
0.00 (Pa)  
28
Elasticity properties
  
  
Shear Modulus
61.00 GPa  
14
222.00 GPa  
1
Bulk Modulus
230.00 GPa  
6
462.00 GPa  
1
Young's Modulus
168.00 GPa  
14
Not Available  
Poisson Ratio
0.38  
6
0.25  
24
Other Mechanical Properties
Ductile, Malleable  
Ductile  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
21.45  
4
22.57  
2
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
3
Not Available  
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
105.00 nΩ·m  
30
81.20 nΩ·m  
35
Electrical Conductivity
0.10 106/cm Ω  
21
0.11 106/cm Ω  
18
Electron Affinity
205.30 kJ/mol  
2
106.10 kJ/mol  
9
Thermal Properties
Specific Heat
0.13 J/(kg K)  
39
0.13 J/(kg K)  
39
Molar Heat Capacity
25.86 J/mol·K  
35
24.70 J/mol·K  
99+
Thermal Conductivity
71.60 W/m·K  
24
87.60 W/m·K  
19
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
8.80 µm/(m·K)  
99+
5.10 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
510.50 kJ/mol  
11
627.60 kJ/mol  
7
Enthalpy of Fusion
19.70 kJ/mol  
12
29.30 kJ/mol  
4
Enthalpy of Atomization
565.00 kJ/mol  
11
669.00 kJ/mol  
6
Standard Molar Entropy
41.60 J/mol.K  
36
32.60 J/mol.K  
99+
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