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
74404627439910
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
Earth's crust, Found in Minerals, Mining, Ores of Minerals
Found in Minerals, Mining, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Robert Bunsen and Gustav Kirchhoff
Carl Gustaf Mosander
2.3.2 Discovery
2.4 Abundance
2.4.1 Abundance In Universe
8 * 10-8 %2 * 10-7 %
5E-09
0.11
2.4.2 Abundance In Sun
~0.0000008 %~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
- The most common use of cesium metal is as a drilling fluid. It is also used in optical glass manufacturing.
-
In vacuum tubes and radiation monitor equipment this metal is used as a catalyst promoter.
- 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
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
Electrical Industry, Electronic Industry
3.1.2 Medical Uses
3.1.3 Other Uses
Alloys
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
0.05 p.p.m.0.08 p.p.m.
0
170000
4 Physical
4.1 Melting Point
28.50 °C920.00 °C
27
3410
4.2 Boiling Point
678.40 °C3,469.00 °C
147
5660
4.3 Appearance
4.3.1 Physical State
4.3.2 Color
Silvery Gold
Silvery White
4.3.3 Luster
4.4 Hardness
4.4.1 Mohs Hardness
4.4.2 Brinell Hardness
0.14 MPa350.00 MPa
0.14
3490
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
375.70 kJ/mol538.10 kJ/mol
375.7
26130
5.5.2 2nd Energy Level
2,234.30 kJ/mol1,067.00 kJ/mol
710.2162
28750
5.5.3 3rd Energy Level
3,400.00 kJ/mol1,850.30 kJ/mol
1600
34230
5.5.4 4th Energy Level
NA4,819.00 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
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
4.96 g/amp-hr1.73 g/amp-hr
0.16812
8.3209
5.7 Electron Work Function
5.8 Other Chemical Properties
Chemical Stability, Corrosion, Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Solubility
6 Atomic
6.1 Atomic Number
6.2 Electron Configuration
6.3 Crystal Structure
Body Centered Cubic (BCC)
Double Hexagonal Close Packed (DHCP)
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
265.00 pm187.00 pm
112
265
6.5.2 Covalent Radius
244.00 pm207.00 pm
96
260
6.5.3 Van der Waals Radius
343.00 pm240.00 pm
139
348
6.6 Atomic Weight
132.91 amu138.91 amu
6.94
294
6.7 Atomic Volume
71.07 cm3/mol20.73 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
8.62 (-eV)40.71 (-eV)
8
392.42
6.10 Lattice Constant
614.10 pm377.20 pm
228.58
891.25
6.11 Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
6.12 Lattice C/A Ratio
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
1.93 g/cm36.16 g/cm3
0.534
40.7
7.1.2 Density When Liquid (at m.p.)
1.84 g/cm35.94 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
7.5.2 Bulk Modulus
1.60 GPa27.90 GPa
1.6
462
7.5.3 Young's Modulus
1.70 GPa36.60 GPa
1.7
528
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
Paramagnetic
Paramagnetic
8.1.3 Permeability
8.1.4 Susceptibility
8.2 Electrical Properties
8.2.1 Electrical Property
8.2.2 Resistivity
205.00 nΩ·m615.00 nΩ·m
0.18
961
8.2.3 Electrical Conductivity
0.05 106/cm Ω0.01 106/cm Ω
0.00666
0.63
8.2.4 Electron Affinity
45.50 kJ/mol48.00 kJ/mol
0
222.8
9 Thermal
9.1 Specific Heat
0.24 J/(kg K)0.19 J/(kg K)
0.11
3.6
9.2 Molar Heat Capacity
32.21 J/mol·K27.11 J/mol·K
16.443
62.7
9.3 Thermal Conductivity
35.90 W/m·K13.40 W/m·K
6.3
429
9.4 Critical Temperature
9.5 Thermal Expansion
97.00 µm/(m·K)12.10 µm/(m·K)
4.5
97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
65.90 kJ/mol399.60 kJ/mol
7.32
799.1
9.6.2 Enthalpy of Fusion
2.10 kJ/mol6.20 kJ/mol
2.1
35.23
9.6.3 Enthalpy of Atomization
78.20 kJ/mol431.00 kJ/mol
61.5
837
9.7 Standard Molar Entropy
85.20 J/mol.K56.90 J/mol.K
9.5
198.1