Symbol
Pt
  
Th
  
Period Number
6
  
7
  
Block
d block
  
f block
  
Element Family
Transition Metal
  
Actinide
  
Space Group Name
Fm_ 3m
  
P63/mmc
  
Interesting Facts
- Platinum is the rarest metal from the Precious metal categories..
- Commercially Platinum is produced as a byproduct in ores of nickel.
  
- Thorium metal is used as an alternate option over Uranium for nuclear fuel.
- Thorium metals appearance (silvery white, soft) is somewhat similar to Lead metal.
  
Sources
Mining, Ores of metals, Ores of Minerals
  
Found in Minerals, Mining
  
History
  
  
Who Discovered
Antonio de Ulloa
  
Jöns Jakob Berzelius
  
Discovery
In 1735
  
In 1829
  
Abundance
  
  
Abundance In Sun
~0.0000009 %
  
19
Abundance In Earth's Crust
Abundance In Oceans
Not Available
  
Uses & Benefits
- Platinum metal is mainly used in jewellery.
-
Platinum is used as an industrial catalyst in production of nitric acid, silicone and benzene.
  
- Thorium metal is used as an allying agent for Magnesium, It imparts greater strength and resistance to temperature.
-
compound of this metal Thorium oxide is used as an industrial catalyst.
  
Industrial Uses
Aerospace Industry, Chemical Industry
  
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
  
Medical Uses
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing
  
Dentistry, Surgical Instruments Manufacturing
  
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
  
Alloys, Jewellery, Sculptures, Statues
  
Biological Properties
  
  
Toxicity
Non Toxic
  
Non Toxic
  
Present in Human Body
No
  
Yes
  
In Blood
Not Available
  
0.00 Blood/mg dm-3
  
33
In Bone
Not Available
  
0.02 p.p.m.
  
29
Melting Point
1,772.00 °C
  
16
1,750.00 °C
  
17
Boiling Point
3,827.00 °C
  
15
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silvery White
  
Silver
  
Luster
Metallic
  
NA
  
Hardness
  
  
Speed of Sound
2,800.00 m/s
  
29
2,490.00 m/s
  
36
Optical Properties
  
  
Reflectivity
Not Available
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Pt
  
Th
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Allred Rochow Electronegativity
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
870.00 kJ/mol
  
10
587.00 kJ/mol
  
99+
2nd Energy Level
1,791.00 kJ/mol
  
21
1,110.00 kJ/mol
  
99+
3rd Energy Level
Not Available
  
1,978.00 kJ/mol
  
99+
4th Energy Level
Not Available
  
2,780.00 kJ/mol
  
99+
Electrochemical Equivalent
1.82 g/amp-hr
  
35
2.16 g/amp-hr
  
24
Other Chemical Properties
Chemical Stability, Anti Corrosion, Ionization
  
Corrosion, Ionization, Radioactive Isotopes, Radioactivity
  
Electron Configuration
[Xe] 4f14 5d9 6s1
  
[Rn] 6d2 7s2
  
Crystal Structure
Face Centered Cubic (FCC)
  
Face Centered Cubic (FCC)
  
Crystal Lattice
FCC-Crystal-Structure-of-Platinum.jpg#100
  
FCC-Crystal-Structure-of-Thorium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Volume
9.09 cm3/mol
  
99+
19.90 cm3/mol
  
20
Adjacent Atomic Numbers
  
  
Valence Electron Potential
392.42 (-eV)
  
1
59.30 (-eV)
  
23
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
21.45 g/cm3
  
11
11.72 g/cm3
  
32
Density When Liquid (at m.p.)
Not Available
  
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Elasticity properties
  
  
Other Mechanical Properties
Ductile, Malleable
  
Ductile
  
Magnetic Characteristics
  
  
Magnetic Ordering
Paramagnetic
  
Paramagnetic
  
Permeability
Not Available
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Superconductor
  
Resistivity
105.00 nΩ·m
  
30
157.00 nΩ·m
  
22
Electrical Conductivity
0.10 106/cm Ω
  
21
0.07 106/cm Ω
  
31
Electron Affinity
205.30 kJ/mol
  
2
Not Available
  
Specific Heat
0.13 J/(kg K)
  
39
0.12 J/(kg K)
  
40
Molar Heat Capacity
25.86 J/mol·K
  
35
26.23 J/mol·K
  
30
Thermal Conductivity
71.60 W/m·K
  
24
54.00 W/m·K
  
28
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
8.80 µm/(m·K)
  
99+
11.00 µm/(m·K)
  
36
Enthalpy
  
  
Enthalpy of Vaporization
510.50 kJ/mol
  
11
429.00 kJ/mol
  
15
Enthalpy of Fusion
19.70 kJ/mol
  
12
15.48 kJ/mol
  
19
Enthalpy of Atomization
565.00 kJ/mol
  
11
468.60 kJ/mol
  
15
Standard Molar Entropy
41.60 J/mol.K
  
36
27.30 J/mol.K
  
99+