1 Periodic Table
1.1 Symbol
1.2 Group Number
2.3 Period Number
2.5 Block
2.6 Element Family
2.7 CAS Number
74399107440348
7429905
54386242
3.2 Space Group Name
3.3 Space Group Number
4 Facts
4.1 Interesting Facts
- Lanthanum metal is highly malleable, ductile and sectile.
- If exposed to air Lanthanum metal oxidizes rapidly.
Not Available
4.2 Sources
Found in Minerals, Mining, Ores of Minerals
Obtained by Treating Radium with Neutrons, Ores of metals
4.3 History
4.3.1 Who Discovered
Carl Gustaf Mosander
Friedrich Oskar Giesel
4.3.2 Discovery
4.4 Abundance
4.4.1 Abundance In Universe
5.2.2 Abundance In Sun
~0.0000002 %~-9999 %
1E-08
0.1
5.4.2 Abundance In Meteorites
7.1.3 Abundance In Earth's Crust
7.4.2 Abundance In Oceans
7.5.5 Abundance In Humans
8 Uses
8.1 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.
- Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
8.1.1 Industrial Uses
Electrical Industry, Electronic Industry
NA
8.1.2 Medical Uses
8.1.3 Other Uses
Alloys, Mirror Manufacturing
Alloys, Nuclear Research, Research Purposes
8.2 Biological Properties
8.2.1 Toxicity
8.2.2 Present in Human Body
8.2.3 In Blood
NA0.00 Blood/mg dm-3
0
1970
8.4.2 In Bone
0.08 p.p.m.0.00 p.p.m.
0
170000
10 Physical
10.1 Melting Point
920.00 °C1,227.00 °C
27
3410
11.2 Boiling Point
3,469.00 °C3,200.00 °C
147
5660
12.5 Appearance
12.5.1 Physical State
12.5.2 Color
Silvery White
Silvery White
12.5.3 Luster
12.6 Hardness
12.6.1 Mohs Hardness
12.8.2 Brinell Hardness
12.10.2 Vickers Hardness
12.15 Speed of Sound
12.16 Optical Properties
12.16.1 Refractive Index
12.17.2 Reflectivity
12.18 Allotropes
12.18.1 α Allotropes
Not Available
Not Available
12.18.2 β Allotropes
Not Available
Not Available
12.18.3 γ Allotropes
Not Available
Not Available
13 Chemical
13.1 Chemical Formula
13.2 Isotopes
13.2.1 Known Isotopes
13.3 Electronegativity
13.3.2 Pauling Electronegativity
13.3.4 Sanderson Electronegativity
13.3.7 Allred Rochow Electronegativity
13.3.10 Mulliken-Jaffe Electronegativity
13.3.14 Allen Electronegativity
13.4 Electropositivity
13.4.1 Pauling Electropositivity
13.5 Ionization Energies
13.5.1 1st Energy Level
538.10 kJ/mol499.00 kJ/mol
375.7
26130
13.5.4 2nd Energy Level
1,067.00 kJ/mol1,170.00 kJ/mol
710.2162
28750
13.5.6 3rd Energy Level
1,850.30 kJ/mol1,900.00 kJ/mol
1600
34230
13.5.8 4th Energy Level
4,819.00 kJ/mol4,700.00 kJ/mol
2780
37066
1.2.2 5th Energy Level
5,940.00 kJ/molNA
4305.2
97510
1.3.2 6th Energy Level
1.6.3 7th Energy level
1.8.1 8th Energy Level
1.8.4 9th Energy Level
2.4.3 10th Energy Level
2.4.7 11th Energy Level
2.4.11 12th Energy Level
2.4.16 13th Energy Level
2.4.21 14th Energy Level
2.4.26 15th Energy Level
2.4.30 16th Energy Level
3.2.4 17th Energy Level
3.2.8 18th Energy Level
3.2.13 19th Energy Level
4.2.2 20th Energy Level
4.2.4 21st Energy Level
4.5.1 22nd Energy Level
5.1.1 23rd Energy Level
5.4.1 24th Energy Level
5.7.3 25th Energy Level
6.1.1 26th Energy Level
6.1.4 27th Energy Level
6.4.2 28th Energy Level
1.3.1 29th Energy Level
1.3.3 30th Energy Level
1.6 Electrochemical Equivalent
1.73 g/amp-hr2.82 g/amp-hr
0.16812
8.3209
1.9 Electron Work Function
2.4 Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
3 Atomic
3.1 Atomic Number
3.6 Electron Configuration
[Xe] 5d2 6s2
[Rn] 6d1 7s2
3.7 Crystal Structure
Double Hexagonal Close Packed (DHCP)
Face Centered Cubic (FCC)
3.7.1 Crystal Lattice
3.8 Atom
3.8.1 Number of Protons
4.5.1 Number of Neutrons
4.8.1 Number of Electrons
4.12 Radius of an Atom
4.12.1 Atomic Radius
187.00 pm195.00 pm
112
265
5.2.2 Covalent Radius
5.4.2 Van der Waals Radius
5.7 Atomic Weight
138.91 amu227.00 amu
6.94
294
6.2 Atomic Volume
20.73 cm3/mol22.54 cm3/mol
1.39
71.07
7.3 Adjacent Atomic Numbers
7.3.1 Previous Element
7.3.2 Next Element
7.4 Valence Electron Potential
40.71 (-eV)38.60 (-eV)
8
392.42
7.6 Lattice Constant
377.20 pm567.00 pm
228.58
891.25
7.9 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
8.2 Lattice C/A Ratio
9 Mechanical
9.1 Density
9.1.1 Density At Room Temperature
6.16 g/cm310.00 g/cm3
0.534
40.7
9.2.3 Density When Liquid (at m.p.)
9.6 Tensile Strength
9.8 Viscosity
10.2 Vapor Pressure
10.2.1 Vapor Pressure at 1000 K
10.2.7 Vapor Pressure at 2000 K
10.5 Elasticity properties
10.5.1 Shear Modulus
11.1.3 Bulk Modulus
11.2.5 Young's Modulus
13.2 Poisson Ratio
13.4 Other Mechanical Properties
14 Magnetic
14.1 Magnetic Characteristics
14.1.1 Specific Gravity
14.2.3 Magnetic Ordering
Paramagnetic
Paramagnetic
14.2.4 Permeability
14.3.4 Susceptibility
15.2 Electrical Properties
15.2.1 Electrical Property
15.2.2 Resistivity
15.4.1 Electrical Conductivity
0.01 106/cm ΩNA
0.00666
0.63
15.6.2 Electron Affinity
16 Thermal
16.1 Specific Heat
0.19 J/(kg K)0.12 J/(kg K)
0.11
3.6
16.4 Molar Heat Capacity
27.11 J/mol·K27.20 J/mol·K
16.443
62.7
16.8 Thermal Conductivity
13.40 W/m·K12.00 W/m·K
6.3
429
16.10 Critical Temperature
16.11 Thermal Expansion
16.12 Enthalpy
16.12.1 Enthalpy of Vaporization
399.60 kJ/molNA
7.32
799.1
16.14.1 Enthalpy of Fusion
16.15.2 Enthalpy of Atomization
431.00 kJ/mol301.00 kJ/mol
61.5
837
17.2 Standard Molar Entropy
56.90 J/mol.K56.50 J/mol.K
9.5
198.1