1 Periodic Table
1.1 Symbol
1.2 Group Number
1.3 Period Number
1.4 Block
1.5 Element Family
1.6 CAS Number
74403487439910
7429905
54386242
1.7 Space Group Name
1.8 Space Group Number
2 Facts
2.1 Interesting Facts
Not Available
- Lanthanum metal is highly malleable, ductile and sectile.
- If exposed to air Lanthanum metal oxidizes rapidly.
2.2 Sources
Obtained by Treating Radium with Neutrons, Ores of metals
Found in Minerals, Mining, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Friedrich Oskar Giesel
Carl Gustaf Mosander
2.3.2 Discovery
2.4 Abundance
2.4.1 Abundance In Universe
2.4.2 Abundance In Sun
~-9999 %~0.0000002 %
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
- Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
- 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.
3.1.1 Industrial Uses
NA
Electrical Industry, Electronic Industry
3.1.2 Medical Uses
3.1.3 Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys, Mirror Manufacturing
3.2 Biological Properties
3.2.1 Toxicity
3.2.2 Present in Human Body
3.2.3 In Blood
0.00 Blood/mg dm-3NA
0
1970
3.2.4 In Bone
0.00 p.p.m.0.08 p.p.m.
0
170000
4 Physical
4.1 Melting Point
1,227.00 °C920.00 °C
27
3410
4.2 Boiling Point
3,200.00 °C3,469.00 °C
147
5660
4.3 Appearance
4.3.1 Physical State
4.3.2 Color
Silvery White
Silvery White
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
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
499.00 kJ/mol538.10 kJ/mol
375.7
26130
5.5.2 2nd Energy Level
1,170.00 kJ/mol1,067.00 kJ/mol
710.2162
28750
5.5.3 3rd Energy Level
1,900.00 kJ/mol1,850.30 kJ/mol
1600
34230
5.5.4 4th Energy Level
4,700.00 kJ/mol4,819.00 kJ/mol
2780
37066
5.5.5 5th Energy Level
NA5,940.00 kJ/mol
4305.2
97510
5.5.6 6th Energy Level
5.5.7 7th Energy level
1.1.2 8th Energy Level
1.1.3 9th Energy Level
1.1.6 10th Energy Level
1.1.8 11th Energy Level
1.2.3 12th Energy Level
1.2.5 13th Energy Level
1.2.6 14th Energy Level
1.2.8 15th Energy Level
1.2.9 16th Energy Level
1.2.10 17th Energy Level
1.2.11 18th Energy Level
1.2.12 19th Energy Level
1.2.13 20th Energy Level
1.2.14 21st Energy Level
1.2.15 22nd Energy Level
1.2.16 23rd Energy Level
1.2.17 24th Energy Level
1.2.18 25th Energy Level
1.2.19 26th Energy Level
1.2.20 27th Energy Level
1.2.21 28th Energy Level
1.2.22 29th Energy Level
1.2.23 30th Energy Level
1.3 Electrochemical Equivalent
2.82 g/amp-hr1.73 g/amp-hr
0.16812
8.3209
1.4 Electron Work Function
1.5 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Solubility
2 Atomic
2.1 Atomic Number
2.2 Electron Configuration
[Rn] 6d1 7s2
[Xe] 5d2 6s2
2.3 Crystal Structure
Face Centered Cubic (FCC)
Double Hexagonal Close Packed (DHCP)
2.3.1 Crystal Lattice
2.4 Atom
2.4.1 Number of Protons
2.4.2 Number of Neutrons
2.4.3 Number of Electrons
2.5 Radius of an Atom
2.5.1 Atomic Radius
195.00 pm187.00 pm
112
265
2.5.2 Covalent Radius
2.5.3 Van der Waals Radius
2.6 Atomic Weight
227.00 amu138.91 amu
6.94
294
2.7 Atomic Volume
22.54 cm3/mol20.73 cm3/mol
1.39
71.07
2.8 Adjacent Atomic Numbers
2.8.1 Previous Element
2.8.2 Next Element
2.9 Valence Electron Potential
38.60 (-eV)40.71 (-eV)
8
392.42
2.10 Lattice Constant
567.00 pm377.20 pm
228.58
891.25
2.11 Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
2.12 Lattice C/A Ratio
3 Mechanical
3.1 Density
3.1.1 Density At Room Temperature
10.00 g/cm36.16 g/cm3
0.534
40.7
3.1.2 Density When Liquid (at m.p.)
3.2 Tensile Strength
3.3 Viscosity
3.4 Vapor Pressure
3.4.1 Vapor Pressure at 1000 K
3.4.2 Vapor Pressure at 2000 K
3.5 Elasticity properties
3.5.1 Shear Modulus
3.5.2 Bulk Modulus
3.5.3 Young's Modulus
3.6 Poisson Ratio
3.7 Other Mechanical Properties
4 Magnetic
4.1 Magnetic Characteristics
4.1.1 Specific Gravity
4.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
4.1.3 Permeability
4.1.4 Susceptibility
4.2 Electrical Properties
4.2.1 Electrical Property
4.2.2 Resistivity
4.2.3 Electrical Conductivity
NA0.01 106/cm Ω
0.00666
0.63
4.2.4 Electron Affinity
5 Thermal
5.1 Specific Heat
0.12 J/(kg K)0.19 J/(kg K)
0.11
3.6
5.2 Molar Heat Capacity
27.20 J/mol·K27.11 J/mol·K
16.443
62.7
5.3 Thermal Conductivity
12.00 W/m·K13.40 W/m·K
6.3
429
5.4 Critical Temperature
5.5 Thermal Expansion
5.6 Enthalpy
5.6.1 Enthalpy of Vaporization
NA399.60 kJ/mol
7.32
799.1
5.6.2 Enthalpy of Fusion
5.6.3 Enthalpy of Atomization
301.00 kJ/mol431.00 kJ/mol
61.5
837
5.7 Standard Molar Entropy
56.50 J/mol.K56.90 J/mol.K
9.5
198.1