Indium Platinum Comparison
Periodic Table
Symbol
In
Pt
Group Number
13
5
10
8
Period Number
5
6
Block
p block
d block
Element Family
Post-Transition
Transition Metal
CAS Number
7440746
17
7440064
99+
Space Group Name
I4/mmm
Fm_ 3m
Space Group Number
139.00
8
225.00
2
Facts
Interesting Facts
- Luster of Indium is bright in nature.
- Reich and richer were looking for thallium in zinc metal and they discovered Indium metal.
- Platinum is the rarest metal from the Precious metal categories..
- Commercially Platinum is produced as a byproduct in ores of nickel.
Sources
Mining, Ores of metals
Mining, Ores of metals, Ores of Minerals
History
Who Discovered
Ferdinand Reich and Hieronymous Theodor Richter
Antonio de Ulloa
Discovery
In 1863
In 1735
Abundance
Abundance In Universe
3 * 10-8 %
28
5 * 10-7 %
19
Abundance In Sun
~0.0000004 %
23
~0.0000009 %
19
Abundance In Meteorites
0.00 %
99+
0.00 %
25
Abundance In Earth's Crust
0.00 %
99+
0.00 %
99+
Abundance In Oceans
0.00 %
99+
Not Available
Uses
Uses & Benefits
- It is used to produce indium tin oxide (ITO), it is used in manufacturing touch screens, flat screen TVs and solar panels.
- Its nitride, phosphide and antimonide are used in transistors and microchips.
- Platinum metal is mainly used in jewellery.
- Platinum is used as an industrial catalyst in production of nitric acid, silicone and benzene.
Industrial Uses
Aerospace Industry, Automobile Industry
Aerospace Industry, Chemical Industry
Medical Uses
Medical Research
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing
Other Uses
Alloys, In Nuclear Reactors
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
Biological Properties
Toxicity
Non Toxic
Non Toxic
Present in Human Body
Yes
No
Physical Properties
Melting Point
156.61 °C
99+
1,772.00 °C
16
Boiling Point
2,000.00 °C
99+
3,827.00 °C
15
Appearance
Physical State
Solid
Solid
Color
Silvery Gray
Silvery White
Luster
Lustrous
Metallic
Hardness
Mohs Hardness
1.20
20
3.50
11
Brinell Hardness
8.80 MPa
99+
300.00 MPa
34
Vickers Hardness
Not Available
400.00 MPa
25
Speed of Sound
1,215.00 m/s
99+
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
In
Pt
Isotopes
Known Isotopes
35
4
35
4
Electronegativity
Pauling Electronegativity
1.78
16
2.28
3
Sanderson Electronegativity
2.14
8
Not Available
Allred Rochow Electronegativity
1.49
13
1.44
17
Mulliken-Jaffe Electronegativity
1.76
10
Not Available
Allen Electronegativity
1.66
18
1.72
16
Electropositivity
Pauling Electropositivity
2.22
38
1.72
99+
Ionization Energies
1st Energy Level
558.30 kJ/mol
99+
870.00 kJ/mol
10
2nd Energy Level
1,820.70 kJ/mol
18
1,791.00 kJ/mol
21
3rd Energy Level
2,704.00 kJ/mol
39
Not Available
4th Energy Level
5,210.00 kJ/mol
17
Not Available
Electrochemical Equivalent
1.43 g/amp-hr
99+
1.82 g/amp-hr
35
Electron Work Function
4.12 eV
24
5.65 eV
1
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Chemical Stability, Anti Corrosion, Ionization
Atomic Properties
Atomic Number
49
99+
78
38
Electron Configuration
[Kr] 4d10 5s2 5p1
[Xe] 4f14 5d9 6s1
Crystal Structure
Tetragonal (TETR)
Face Centered Cubic (FCC)
Crystal Lattice
TETR-Crystal-Structure-of-Indium.jpg#100
FCC-Crystal-Structure-of-Platinum.jpg#100
Atom
Number of Protons
49
99+
78
38
Number of Neutrons
66
99+
117
24
Number of Electrons
49
99+
78
38
Radius of an Atom
Atomic Radius
167.00 pm
24
139.00 pm
39
Covalent Radius
142.00 pm
99+
136.00 pm
99+
Van der Waals Radius
193.00 pm
31
175.00 pm
36
Atomic Weight
114.82 amu
99+
47.87 amu
99+
Atomic Volume
15.70 cm3/mol
33
9.09 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
54.00 (-eV)
25
392.42 (-eV)
1
Lattice Constant
325.23 pm
99+
392.42 pm
24
Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
7.31 g/cm3
99+
21.45 g/cm3
11
Density When Liquid (at m.p.)
7.02 g/cm3
33
19.77 g/cm3
2
Tensile Strength
2.50 MPa
21
125.00 MPa
14
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
0.01 (Pa)
11
Not Available
Vapor Pressure at 2000 K
Not Available
0.07 (Pa)
18
Elasticity properties
Shear Modulus
Not Available
61.00 GPa
14
Bulk Modulus
Not Available
230.00 GPa
6
Young's Modulus
11.00 GPa
99+
168.00 GPa
14
Poisson Ratio
Not Available
0.38
6
Other Mechanical Properties
Ductile, Malleable
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
7.31
99+
21.45
4
Magnetic Ordering
Diamagnetic
Paramagnetic
Permeability
Not Available
0.00 H/m
3
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
83.70 nΩ·m
34
105.00 nΩ·m
30
Electrical Conductivity
0.12 106/cm Ω
17
0.10 106/cm Ω
21
Electron Affinity
28.90 kJ/mol
31
205.30 kJ/mol
2
Thermal Properties
Specific Heat
0.23 J/(kg K)
27
0.13 J/(kg K)
39
Molar Heat Capacity
26.74 J/mol·K
25
25.86 J/mol·K
35
Thermal Conductivity
81.80 W/m·K
21
71.60 W/m·K
24
Critical Temperature
Not Available
Not Available
Thermal Expansion
32.10 µm/(m·K)
9
8.80 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
226.40 kJ/mol
40
510.50 kJ/mol
11
Enthalpy of Fusion
3.28 kJ/mol
99+
19.70 kJ/mol
12
Enthalpy of Atomization
242.70 kJ/mol
99+
565.00 kJ/mol
11
Standard Molar Entropy
57.80 J/mol.K
22
41.60 J/mol.K
36
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