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Platinum vs Cadmium

Platinum
Cadmium
Cadmium vs Platinum


Periodic Table
Symbol
Pt   
Cd   
Group Number
10   
8
12   
6
Period Number
6   
5   
Block
d block   
d block   
Element Family
Transition Metal   
Transition Metal   
CAS Number
7440064   
99+
7440439   
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.
  
  • Naturally occurring minor elements include Cadmium.
  • Cadmium is released into atmosphere to control volcanic eruption and forest fires.
  • It is used for electroplating of Steel for corrosion resistance.
  • It can absorb neutrons and used in nuclear reactor to control atomic fission.
  
Sources
Mining, Ores of metals, Ores of Minerals   
Found As a By-product, Found in Minerals, Mining   
History
  
  
Who Discovered
Antonio de Ulloa   
Karl Samuel Leberecht Hermann and Friedrich Stromeyer   
Discovery
In 1735   
In 1817   
Abundance
  
  
Abundance In Universe
5 * 10-7 %   
19
2 * 10-7 %   
22
Abundance In Sun
~0.0000009 %   
19
~0.0000006 %   
21
Abundance In Meteorites
0.00 %   
25
0.00 %   
31
Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
99+
Abundance In Oceans
Not Available   
0.00 %   
28
Abundance In Humans
Not Available   
0.00 %   
11
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.
  
  • It has very limited uses as it is a toxic metal and it can cause birth defects, cancer, etc.
  • Almost 80% of Cadmium metal is used in Nickel cadmium Batteries and now it is getting replaced with nickel hydride.
  
Industrial Uses
Aerospace Industry, Chemical Industry   
Aerospace Industry, Ammunition Industry, Chemical 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   
Toxic   
Present in Human Body
No   
Yes   
In Blood
Not Available   
0.01 Blood/mg dm-3   
24
In Bone
Not Available   
1.80 p.p.m.   
15
Physical Properties
Melting Point
1,772.00 °C   
16
320.90 °C   
99+
Boiling Point
3,827.00 °C   
15
765.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery Bluish-Gray   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
3.50   
11
2.00   
16
Brinell Hardness
300.00 MPa   
34
203.00 MPa   
39
Vickers Hardness
400.00 MPa   
25
Not Available   
Speed of Sound
2,800.00 m/s   
29
2,310.00 m/s   
39
Optical Properties
  
  
Reflectivity
73.00 %   
8
67.00 %   
11
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   
Cd   
Isotopes
  
  
Known Isotopes
35   
4
34   
5
Electronegativity
  
  
Pauling Electronegativity
2.28   
3
1.69   
17
Sanderson Electronegativity
Not Available   
1.98   
9
Allred Rochow Electronegativity
1.44   
17
1.46   
15
Mulliken-Jaffe Electronegativity
Not Available   
1.53   
13
Allen Electronegativity
1.72   
16
1.52   
27
Electropositivity
  
  
Pauling Electropositivity
1.72   
99+
2.31   
37
Ionization Energies
  
  
1st Energy Level
870.00 kJ/mol   
10
867.80 kJ/mol   
11
2nd Energy Level
1,791.00 kJ/mol   
21
1,631.40 kJ/mol   
32
3rd Energy Level
Not Available   
3,616.00 kJ/mol   
13
Electrochemical Equivalent
1.82 g/amp-hr   
35
2.10 g/amp-hr   
27
Electron Work Function
5.65 eV   
1
4.22 eV   
22
Other Chemical Properties
Chemical Stability, Anti Corrosion, Ionization   
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
78   
38
48   
99+
Electron Configuration
[Xe] 4f14 5d9 6s1   
[Kr] 4d10 5s2   
Crystal Structure
Face Centered Cubic (FCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
FCC-Crystal-Structure-of-Platinum.jpg#100   
HCP-Crystal-Structure-of-Cadmium.jpg#100   
Atom
  
  
Number of Protons
78   
38
48   
99+
Number of Neutrons
117   
24
64   
99+
Number of Electrons
78   
38
48   
99+
Radius of an Atom
  
  
Atomic Radius
139.00 pm   
39
151.00 pm   
32
Covalent Radius
136.00 pm   
99+
144.00 pm   
40
Van der Waals Radius
175.00 pm   
36
158.00 pm   
99+
Atomic Weight
47.87 amu   
99+
112.41 amu   
99+
Atomic Volume
9.09 cm3/mol   
99+
13.10 cm3/mol   
39
Adjacent Atomic Numbers
  
  
Previous Element
Iridium
  
Silver
  
Next Element
Gold
  
Indium
  
Valence Electron Potential
392.42 (-eV)   
1
30.00 (-eV)   
99+
Lattice Constant
392.42 pm   
24
297.94 pm   
99+
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.89   
1
Mechanical Properties
Density
  
  
Density At Room Temperature
21.45 g/cm3   
11
8.65 g/cm3   
99+
Density When Liquid (at m.p.)
19.77 g/cm3   
2
8.00 g/cm3   
28
Tensile Strength
125.00 MPa   
14
62.00 MPa   
16
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.07 (Pa)   
18
Not Available   
Elasticity properties
  
  
Shear Modulus
61.00 GPa   
14
19.00 GPa   
35
Bulk Modulus
230.00 GPa   
6
42.00 GPa   
29
Young's Modulus
168.00 GPa   
14
50.00 GPa   
36
Poisson Ratio
0.38   
6
0.30   
14
Other Mechanical Properties
Ductile, Malleable   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
21.45   
4
8.65   
36
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Permeability
0.00 H/m   
3
Not Available   
Electrical Properties
  
  
Electrical Property
Conductor   
Semiconductor   
Resistivity
105.00 nΩ·m   
30
72.70 nΩ·m   
36
Electrical Conductivity
0.10 106/cm Ω   
21
0.14 106/cm Ω   
15
Electron Affinity
205.30 kJ/mol   
2
0.00 kJ/mol   
40
Thermal Properties
Specific Heat
0.13 J/(kg K)   
39
0.23 J/(kg K)   
26
Molar Heat Capacity
25.86 J/mol·K   
35
26.02 J/mol·K   
32
Thermal Conductivity
71.60 W/m·K   
24
96.60 W/m·K   
16
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
8.80 µm/(m·K)   
99+
30.80 µm/(m·K)   
10
Enthalpy
  
  
Enthalpy of Vaporization
510.50 kJ/mol   
11
100.00 kJ/mol   
99+
Enthalpy of Fusion
19.70 kJ/mol   
12
6.19 kJ/mol   
99+
Enthalpy of Atomization
565.00 kJ/mol   
11
113.00 kJ/mol   
99+
Standard Molar Entropy
41.60 J/mol.K   
36
51.80 J/mol.K   
27
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