1 Periodic Table
1.1 Symbol
1.2 Group Number
1.3 Period Number
1.6 Block
1.7 Element Family
Lanthanide
Post-Transition
1.8 CAS Number
74399107439921
7429905
54386242
1.9 Space Group Name
1.10 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.
- Galena mineral contains almost 87% of Lead metal in it, Galena is sulfide mineral.
- The best available source of Lead metal today is by recycling automobile batteries.
2.2 Sources
Found in Minerals, Mining, Ores of Minerals
Earth's crust, Found in Minerals, Mining, Ores of metals, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Carl Gustaf Mosander
Unknown
2.3.2 Discovery
In 1838
In Middle Easterns (7000 BCE)
2.4 Abundance
2.4.1 Abundance In Universe
2 * 10-7 %1 * 10-6 %
5E-09
0.11
2.4.3 Abundance In Sun
~0.0000002 %~0.000001 %
1E-08
0.1
2.5.1 Abundance In Meteorites
2.5.2 Abundance In Earth's Crust
2.6.3 Abundance In Oceans
2.7.4 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 also used in insecticides, hair dyes and as an anti-knocking additive for petrol. But all these are banned by the government as Lead metal is known for detrimental to health.
3.1.1 Industrial Uses
Electrical Industry, Electronic Industry
Chemical Industry, Electrical Industry, Electronic Industry
3.1.2 Medical Uses
NA
Surgical Instruments Manufacturing
3.1.3 Other Uses
Alloys, Mirror Manufacturing
Alloys
3.2 Biological Properties
3.2.1 Toxicity
3.2.2 Present in Human Body
3.2.3 In Blood
NA0.21 Blood/mg dm-3
0
1970
3.2.4 In Bone
0.08 p.p.m.30.00 p.p.m.
0
170000
4 Physical
4.1 Melting Point
920.00 °C327.50 °C
27
3410
4.2 Boiling Point
3,469.00 °C1,740.00 °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
350.00 MPa38.00 MPa
0.14
3490
4.4.3 Vickers Hardness
4.5 Speed of Sound
2,475.00 m/s1,190.00 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/mol715.60 kJ/mol
375.7
26130
5.5.2 2nd Energy Level
1,067.00 kJ/mol1,450.50 kJ/mol
710.2162
28750
5.5.3 3rd Energy Level
1,850.30 kJ/mol3,081.50 kJ/mol
1600
34230
5.5.4 4th Energy Level
4,819.00 kJ/mol4,083.00 kJ/mol
2780
37066
5.5.5 5th Energy Level
5,940.00 kJ/mol6,640.00 kJ/mol
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-hr3.87 g/amp-hr
0.16812
8.3209
5.7 Electron Work Function
5.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Anti Corrosion, Ionization, Radioactive Isotopes
6 Atomic
6.1 Atomic Number
6.2 Electron Configuration
[Xe] 5d2 6s2
[Xe] 4f14 5d10 6s2 6p2
6.3 Crystal Structure
Double Hexagonal Close Packed (DHCP)
Face Centered Cubic (FCC)
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 pm175.00 pm
112
265
6.5.2 Covalent Radius
207.00 pm146.00 pm
96
260
6.5.3 Van der Waals Radius
240.00 pm202.00 pm
139
348
6.6 Atomic Weight
138.91 amu207.20 amu
6.94
294
6.7 Atomic Volume
20.73 cm3/mol18.17 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)24.20 (-eV)
8
392.42
6.10 Lattice Constant
377.20 pm495.08 pm
228.58
891.25
6.11 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
6.12 Lattice C/A Ratio
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
6.16 g/cm311.34 g/cm3
0.534
40.7
7.1.2 Density When Liquid (at m.p.)
5.94 g/cm310.66 g/cm3
0.512
20
7.2 Tensile Strength
7.3 Viscosity
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
14.30 GPa5.60 GPa
1.3
222
7.5.2 Bulk Modulus
27.90 GPa46.00 GPa
1.6
462
7.5.3 Young's Modulus
36.60 GPa16.00 GPa
1.7
528
7.6 Poisson Ratio
7.7 Other Mechanical Properties
Ductile
Ductile, Malleable
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·m208.00 nΩ·m
0.18
961
8.2.3 Electrical Conductivity
0.01 106/cm Ω0.05 106/cm Ω
0.00666
0.63
8.2.4 Electron Affinity
48.00 kJ/mol35.10 kJ/mol
0
222.8
9 Thermal
9.1 Specific Heat
0.19 J/(kg K)0.13 J/(kg K)
0.11
3.6
9.2 Molar Heat Capacity
27.11 J/mol·K26.65 J/mol·K
16.443
62.7
9.3 Thermal Conductivity
13.40 W/m·K35.30 W/m·K
6.3
429
9.4 Critical Temperature
9.5 Thermal Expansion
12.10 µm/(m·K)28.90 µm/(m·K)
4.5
97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
399.60 kJ/mol179.40 kJ/mol
7.32
799.1
9.6.2 Enthalpy of Fusion
6.20 kJ/mol4.77 kJ/mol
2.1
35.23
9.6.3 Enthalpy of Atomization
431.00 kJ/mol194.60 kJ/mol
61.5
837
9.7 Standard Molar Entropy
56.90 J/mol.K64.80 J/mol.K
9.5
198.1