1 Periodic Table
1.1 Symbol
1.2 Group Number
1.3 Period Number
1.4 Block
1.5 Element Family
Lanthanide
Transition Metal
1.6 CAS Number
74399107439976
7429905
54386242
1.7 Space Group Name
1.8 Space Group Number
2 Facts
2.1 Interesting Facts
- Lanthanum metal is highly malleable, ductile and sectile.
- If exposed to air Lanthanum metal oxidizes rapidly.
- At room temperature mercury is found in a liquid state.
- A coin of pound or rupees floats in mercury.
- Because of its low melting point and boiling point it is used in thermometers.
2.2 Sources
Found in Minerals, Mining, Ores of Minerals
Mining, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Carl Gustaf Mosander
Ancient Chinese and Indians
2.3.2 Discovery
2.4 Abundance
2.4.1 Abundance In Universe
2.4.2 Abundance In Sun
~0.0000002 %~-9999 %
1E-08
0.1
2.4.3 Abundance In Meteorites
2.4.4 Abundance In Earth's Crust
2.4.5 Abundance In Oceans
2.4.6 Abundance In Humans
3 Uses
3.1 Uses & Benefits
- It has no commercial uses, but its alloys are in high demand. Lanthanum and Nickel alloy is used for the hydrogen gas storage.
- The best-known use for mischmetal alloy of Lanthanum is; as a ‘flints’ for cigarette lighters.
- It is a liquid metal at room temperature, but it is a toxic heavy metal and hence many uses of mercury are under review or phased out.
- It is manly used as a catalysts in chemical industry.
3.1.1 Industrial Uses
Electrical Industry, Electronic Industry
Electrical Industry, Electronic Industry
3.1.2 Medical Uses
3.1.3 Other Uses
Alloys, Mirror Manufacturing
Alloys, Mirror Manufacturing, Pharmaceutical Industry
3.2 Biological Properties
3.2.1 Toxicity
3.2.2 Present in Human Body
3.2.3 In Blood
NA0.01 Blood/mg dm-3
0
1970
3.2.4 In Bone
0.08 p.p.m.0.45 p.p.m.
0
170000
4 Physical
4.1 Melting Point
4.2 Boiling Point
3,469.00 °C356.58 °C
147
5660
4.3 Appearance
4.3.1 Physical State
4.3.2 Color
4.3.3 Luster
4.4 Hardness
4.4.1 Mohs Hardness
4.4.2 Brinell Hardness
4.4.3 Vickers Hardness
4.5 Speed of Sound
2,475.00 m/s1,451.40 m/s
818
16200
4.6 Optical Properties
4.6.1 Refractive Index
4.6.2 Reflectivity
4.7 Allotropes
4.7.1 α Allotropes
Not Available
Not Available
4.7.2 β Allotropes
Not Available
Not Available
4.7.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
5.2 Isotopes
5.2.1 Known Isotopes
5.3 Electronegativity
5.3.1 Pauling Electronegativity
5.3.2 Sanderson Electronegativity
5.3.3 Allred Rochow Electronegativity
5.3.4 Mulliken-Jaffe Electronegativity
5.3.5 Allen Electronegativity
5.4 Electropositivity
5.4.1 Pauling Electropositivity
5.5 Ionization Energies
5.5.1 1st Energy Level
538.10 kJ/mol1,007.10 kJ/mol
375.7
26130
5.5.2 2nd Energy Level
1,067.00 kJ/mol1,810.00 kJ/mol
710.2162
28750
5.5.3 3rd Energy Level
1,850.30 kJ/mol3,300.00 kJ/mol
1600
34230
5.5.4 4th Energy Level
4,819.00 kJ/molNA
2780
37066
5.5.5 5th Energy Level
5,940.00 kJ/molNA
4305.2
97510
5.5.6 6th Energy Level
5.5.7 7th Energy level
5.5.8 8th Energy Level
5.5.9 9th Energy Level
5.5.10 10th Energy Level
5.5.11 11th Energy Level
5.5.12 12th Energy Level
5.5.13 13th Energy Level
5.5.14 14th Energy Level
5.5.15 15th Energy Level
5.5.16 16th Energy Level
5.5.17 17th Energy Level
5.5.18 18th Energy Level
5.5.19 19th Energy Level
5.5.20 20th Energy Level
5.5.21 21st Energy Level
5.5.22 22nd Energy Level
5.5.23 23rd Energy Level
5.5.24 24th Energy Level
5.5.25 25th Energy Level
5.5.26 26th Energy Level
5.5.27 27th Energy Level
5.5.28 28th Energy Level
5.5.29 29th Energy Level
5.5.30 30th Energy Level
5.6 Electrochemical Equivalent
1.73 g/amp-hr3.74 g/amp-hr
0.16812
8.3209
5.7 Electron Work Function
5.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Flammability, Ionization, Solubility
6 Atomic
6.1 Atomic Number
6.2 Electron Configuration
[Xe] 5d2 6s2
[Xe] 4f14 5d10 6s2
6.3 Crystal Structure
Double Hexagonal Close Packed (DHCP)
Rhombohedral (RHO)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
6.4.2 Number of Neutrons
6.4.3 Number of Electrons
6.5 Radius of an Atom
6.5.1 Atomic Radius
187.00 pm151.00 pm
112
265
6.5.2 Covalent Radius
207.00 pm132.00 pm
96
260
6.5.3 Van der Waals Radius
240.00 pm155.00 pm
139
348
6.6 Atomic Weight
138.91 amu200.59 amu
6.94
294
6.7 Atomic Volume
20.73 cm3/mol14.82 cm3/mol
1.39
71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
40.71 (-eV)28.20 (-eV)
8
392.42
6.10 Lattice Constant
377.20 pm300.50 pm
228.58
891.25
6.11 Lattice Angles
6.12 Lattice C/A Ratio
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
6.16 g/cm313.53 g/cm3
0.534
40.7
7.1.2 Density When Liquid (at m.p.)
7.2 Tensile Strength
7.3 Viscosity
NA0.00
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0.001526
0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
7.4.2 Vapor Pressure at 2000 K
7.5 Elasticity properties
7.5.1 Shear Modulus
7.5.2 Bulk Modulus
7.5.3 Young's Modulus
7.6 Poisson Ratio
7.7 Other Mechanical Properties
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
8.1.2 Magnetic Ordering
8.1.3 Permeability
8.1.4 Susceptibility
8.2 Electrical Properties
8.2.1 Electrical Property
8.2.2 Resistivity
615.00 nΩ·m961.00 nΩ·m
0.18
961
8.2.3 Electrical Conductivity
0.01 106/cm Ω0.01 106/cm Ω
0.00666
0.63
8.2.4 Electron Affinity
48.00 kJ/mol0.00 kJ/mol
0
222.8
9 Thermal
9.1 Specific Heat
0.19 J/(kg K)0.14 J/(kg K)
0.11
3.6
9.2 Molar Heat Capacity
27.11 J/mol·K27.98 J/mol·K
16.443
62.7
9.3 Thermal Conductivity
13.40 W/m·K8.30 W/m·K
6.3
429
9.4 Critical Temperature
9.5 Thermal Expansion
12.10 µm/(m·K)60.40 µm/(m·K)
4.5
97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
399.60 kJ/mol56.90 kJ/mol
7.32
799.1
9.6.2 Enthalpy of Fusion
6.20 kJ/mol2.29 kJ/mol
2.1
35.23
9.6.3 Enthalpy of Atomization
431.00 kJ/mol61.50 kJ/mol
61.5
837
9.7 Standard Molar Entropy
56.90 J/mol.K75.80 J/mol.K
9.5
198.1