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Erbium vs Platinum

Erbium
Platinum
Platinum vs Erbium


Periodic Table
Symbol
Er  
Pt  
Group Number
Not Available  
10  
8
Period Number
6  
6  
Block
f block  
d block  
Element Family
Lanthanide  
Transition Metal  
CAS Number
7440520  
35
7440064  
99+
Space Group Name
P63/mmc  
Fm_ 3m  
Space Group Number
194.00  
5
225.00  
2
Facts
Interesting Facts
  • Erbium metal is used as alloyed with Vanadium to make it softer.
  • Recent studies shows that it is helpful for metabolism.
  
  • Platinum is the rarest metal from the Precious metal categories..
  • Commercially Platinum is produced as a byproduct in ores of nickel.
  
Sources
Mining  
Mining, Ores of metals, Ores of Minerals  
History
  
  
Who Discovered
Carl Gustaf Mosander  
Antonio de Ulloa  
Discovery
In 1842  
In 1735  
Abundance
  
  
Abundance In Universe
2 * 10-7 %  
22
5 * 10-7 %  
19
Abundance In Sun
~0.0000001 %  
26
~0.0000009 %  
19
Abundance In Meteorites
0.00 %  
36
0.00 %  
25
Abundance In Earth's Crust
0.00 %  
32
0.00 %  
99+
Abundance In Oceans
0.00 %  
36
Not Available  
Uses
Uses & Benefits
  • It has a tendency to get tarnished in the open air, but when alloyed with elements like erbium, vanadium, its hardness levels decreases.
  • Its compounds like Erbium oxide is used in safety glasses of welders and metal workers.
  
  • Platinum metal is mainly used in jewellery.
  • Platinum is used as an industrial catalyst in production of nitric acid, silicone and benzene.
  
Industrial Uses
Chemical Industry  
Aerospace Industry, Chemical Industry  
Medical Uses
NA  
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing  
Other Uses
Alloys  
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Biological Properties
  
  
Toxicity
Mildly Toxic  
Non Toxic  
Present in Human Body
No  
No  
Physical Properties
Melting Point
1,522.00 °C  
28
1,772.00 °C  
16
Boiling Point
2,510.00 °C  
99+
3,827.00 °C  
15
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
Lustrous  
Metallic  
Hardness
  
  
Mohs Hardness
Not Available  
3.50  
11
Brinell Hardness
814.00 MPa  
11
300.00 MPa  
34
Vickers Hardness
589.00 MPa  
19
400.00 MPa  
25
Speed of Sound
2,830.00 m/s  
28
2,800.00 m/s  
29
Optical Properties
  
  
Reflectivity
Not Available  
73.00 %  
8
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
Er  
Pt  
Isotopes
  
  
Known Isotopes
31  
8
35  
4
Electronegativity
  
  
Pauling Electronegativity
1.24  
36
2.28  
3
Allred Rochow Electronegativity
1.11  
29
1.44  
17
Allen Electronegativity
Not Available  
1.72  
16
Electropositivity
  
  
Pauling Electropositivity
2.76  
18
1.72  
99+
Ionization Energies
  
  
1st Energy Level
589.30 kJ/mol  
99+
870.00 kJ/mol  
10
2nd Energy Level
1,150.00 kJ/mol  
99+
1,791.00 kJ/mol  
21
3rd Energy Level
2,194.00 kJ/mol  
99+
Not Available  
4th Energy Level
4,120.00 kJ/mol  
33
Not Available  
Electrochemical Equivalent
2.08 g/amp-hr  
28
1.82 g/amp-hr  
35
Electron Work Function
Not Available  
5.65 eV  
1
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility  
Chemical Stability, Anti Corrosion, Ionization  
Atomic Properties
Atomic Number
68  
99+
78  
38
Electron Configuration
[Xe] 4f12 6s2  
[Xe] 4f14 5d9 6s1  
Crystal Structure
Hexagonal Close Packed (HCP)  
Face Centered Cubic (FCC)  
Crystal Lattice
HCP-Crystal-Structure-of-Erbium.jpg#100  
FCC-Crystal-Structure-of-Platinum.jpg#100  
Atom
  
  
Number of Protons
68  
99+
78  
38
Number of Neutrons
99  
33
117  
24
Number of Electrons
68  
99+
78  
38
Radius of an Atom
  
  
Atomic Radius
176.00 pm  
18
139.00 pm  
39
Covalent Radius
189.00 pm  
19
136.00 pm  
99+
Van der Waals Radius
Not Available  
175.00 pm  
36
Atomic Weight
167.26 amu  
99+
47.87 amu  
99+
Atomic Volume
18.40 cm3/mol  
25
9.09 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Holmium
  
Iridium
  
Next Element
Thulium
  
Gold
  
Valence Electron Potential
49.00 (-eV)  
29
392.42 (-eV)  
1
Lattice Constant
355.88 pm  
39
392.42 pm  
24
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.57  
17
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
9.07 g/cm3  
99+
21.45 g/cm3  
11
Density When Liquid (at m.p.)
8.86 g/cm3  
23
19.77 g/cm3  
2
Tensile Strength
Not Available  
125.00 MPa  
14
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
20
Not Available  
Vapor Pressure at 2000 K
Not Available  
0.07 (Pa)  
18
Elasticity properties
  
  
Shear Modulus
28.30 GPa  
25
61.00 GPa  
14
Bulk Modulus
44.40 GPa  
27
230.00 GPa  
6
Young's Modulus
69.90 GPa  
29
168.00 GPa  
14
Poisson Ratio
0.24  
28
0.38  
6
Other Mechanical Properties
Malleable  
Ductile, Malleable  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
9.07  
32
21.45  
4
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
Not Available  
0.00 H/m  
3
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
0.86 nΩ·m  
99+
105.00 nΩ·m  
30
Electrical Conductivity
0.01 106/cm Ω  
99+
0.10 106/cm Ω  
21
Electron Affinity
50.00 kJ/mol  
21
205.30 kJ/mol  
2
Thermal Properties
Specific Heat
0.17 J/(kg K)  
34
0.13 J/(kg K)  
39
Molar Heat Capacity
28.12 J/mol·K  
11
25.86 J/mol·K  
35
Thermal Conductivity
14.50 W/m·K  
99+
71.60 W/m·K  
24
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
12.20 µm/(m·K)  
31
8.80 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
261.00 kJ/mol  
35
510.50 kJ/mol  
11
Enthalpy of Fusion
17.20 kJ/mol  
15
19.70 kJ/mol  
12
Enthalpy of Atomization
314.00 kJ/mol  
33
565.00 kJ/mol  
11
Standard Molar Entropy
73.10 J/mol.K  
11
41.60 J/mol.K  
36
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