1 Periodic Table
1.1 Symbol
1.2 Group Number
1.3 Period Number
1.5 Block
1.6 Element Family
Post-Transition
Lanthanide
1.7 CAS Number
74402807439910
7429905
54386242
2.2 Space Group Name
2.3 Space Group Number
3 Facts
3.1 Interesting Facts
- Compounds of Thallium metal are highly Toxic.
- Thallium metal is being suspected as a human carcinogen.
- Lanthanum metal is highly malleable, ductile and sectile.
- If exposed to air Lanthanum metal oxidizes rapidly.
3.2 Sources
Found As a By-product, Ores of metals, Ores of Minerals
Found in Minerals, Mining, Ores of Minerals
3.3 History
3.3.1 Who Discovered
William Crookes
Carl Gustaf Mosander
3.3.2 Discovery
3.4 Abundance
3.4.1 Abundance In Universe
5 * 10-9 %2 * 10-7 %
5E-09
0.11
3.4.3 Abundance In Sun
~0.0000001 %~0.0000002 %
1E-08
0.1
3.4.4 Abundance In Meteorites
3.5.3 Abundance In Earth's Crust
3.5.5 Abundance In Oceans
3.5.6 Abundance In Humans
4 Uses
4.1 Uses & Benefits
- Thallium is a toxic metal and hence it has limited uses. Thallium metal is mostly used for producing photoelectric cells.
- In thermometer’s mercury alloy has 8% of thallium, as it has a melting point lower than 20°C.
- 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.
4.1.1 Industrial Uses
Chemical Industry
Electrical Industry, Electronic Industry
4.1.2 Medical Uses
4.1.3 Other Uses
Alloys
Alloys, Mirror Manufacturing
4.2 Biological Properties
4.2.1 Toxicity
4.2.2 Present in Human Body
4.2.3 In Blood
0.00 Blood/mg dm-3NA
0
1970
5.1.1 In Bone
0.00 p.p.m.0.08 p.p.m.
0
170000
6 Physical
6.1 Melting Point
303.50 °C920.00 °C
27
3410
6.3 Boiling Point
1,457.00 °C3,469.00 °C
147
5660
6.5 Appearance
6.5.1 Physical State
6.5.2 Color
Silvery White
Silvery White
6.5.3 Luster
6.6 Hardness
6.6.1 Mohs Hardness
6.7.1 Brinell Hardness
26.50 MPa350.00 MPa
0.14
3490
6.8.1 Vickers Hardness
6.10 Speed of Sound
818.00 m/s2,475.00 m/s
818
16200
6.11 Optical Properties
6.11.1 Refractive Index
6.11.2 Reflectivity
6.12 Allotropes
6.12.1 α Allotropes
Not Available
Not Available
6.12.2 β Allotropes
Not Available
Not Available
6.12.3 γ Allotropes
Not Available
Not Available
7 Chemical
7.1 Chemical Formula
7.2 Isotopes
7.2.1 Known Isotopes
7.4 Electronegativity
7.4.1 Pauling Electronegativity
7.4.2 Sanderson Electronegativity
7.4.3 Allred Rochow Electronegativity
7.4.4 Mulliken-Jaffe Electronegativity
7.4.5 Allen Electronegativity
7.5 Electropositivity
7.5.1 Pauling Electropositivity
7.6 Ionization Energies
7.6.1 1st Energy Level
589.40 kJ/mol538.10 kJ/mol
375.7
26130
7.6.2 2nd Energy Level
1,971.00 kJ/mol1,067.00 kJ/mol
710.2162
28750
7.6.3 3rd Energy Level
2,878.00 kJ/mol1,850.30 kJ/mol
1600
34230
7.6.4 4th Energy Level
NA4,819.00 kJ/mol
2780
37066
7.6.5 5th Energy Level
NA5,940.00 kJ/mol
4305.2
97510
7.6.6 6th Energy Level
7.6.7 7th Energy level
7.6.8 8th Energy Level
7.6.9 9th Energy Level
7.6.10 10th Energy Level
7.6.11 11th Energy Level
7.6.12 12th Energy Level
7.6.13 13th Energy Level
7.6.14 14th Energy Level
7.6.15 15th Energy Level
7.6.16 16th Energy Level
7.6.17 17th Energy Level
7.6.18 18th Energy Level
7.6.19 19th Energy Level
7.6.20 20th Energy Level
7.6.21 21st Energy Level
7.6.22 22nd Energy Level
7.6.23 23rd Energy Level
7.6.24 24th Energy Level
7.6.25 25th Energy Level
7.6.26 26th Energy Level
7.6.27 27th Energy Level
7.6.28 28th Energy Level
7.6.29 29th Energy Level
7.6.30 30th Energy Level
7.7 Electrochemical Equivalent
7.63 g/amp-hr1.73 g/amp-hr
0.16812
8.3209
7.8 Electron Work Function
7.9 Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Solubility
8 Atomic
8.1 Atomic Number
8.2 Electron Configuration
[Xe] 4f14 5d10 6s2 6p1
[Xe] 5d2 6s2
8.3 Crystal Structure
Hexagonal Close Packed (HCP)
Double Hexagonal Close Packed (DHCP)
8.3.1 Crystal Lattice
8.4 Atom
8.4.1 Number of Protons
8.4.2 Number of Neutrons
8.4.3 Number of Electrons
8.5 Radius of an Atom
8.5.1 Atomic Radius
170.00 pm187.00 pm
112
265
8.5.2 Covalent Radius
145.00 pm207.00 pm
96
260
8.5.3 Van der Waals Radius
196.00 pm240.00 pm
139
348
8.6 Atomic Weight
204.38 amu138.91 amu
6.94
294
8.7 Atomic Volume
17.20 cm3/mol20.73 cm3/mol
1.39
71.07
8.8 Adjacent Atomic Numbers
8.8.1 Previous Element
8.8.2 Next Element
8.9 Valence Electron Potential
9.60 (-eV)40.71 (-eV)
8
392.42
8.10 Lattice Constant
345.66 pm377.20 pm
228.58
891.25
8.11 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
8.12 Lattice C/A Ratio
9 Mechanical
9.1 Density
9.1.1 Density At Room Temperature
11.85 g/cm36.16 g/cm3
0.534
40.7
9.1.2 Density When Liquid (at m.p.)
11.22 g/cm35.94 g/cm3
0.512
20
9.2 Tensile Strength
9.3 Viscosity
9.4 Vapor Pressure
9.4.1 Vapor Pressure at 1000 K
16.90 (Pa)NA
2.47E-11
121
9.4.2 Vapor Pressure at 2000 K
9.5 Elasticity properties
9.5.1 Shear Modulus
2.80 GPa14.30 GPa
1.3
222
9.5.2 Bulk Modulus
43.00 GPa27.90 GPa
1.6
462
9.5.3 Young's Modulus
8.00 GPa36.60 GPa
1.7
528
9.6 Poisson Ratio
9.7 Other Mechanical Properties
10 Magnetic
10.1 Magnetic Characteristics
10.1.1 Specific Gravity
10.1.2 Magnetic Ordering
10.1.3 Permeability
10.1.4 Susceptibility
10.2 Electrical Properties
10.2.1 Electrical Property
10.2.2 Resistivity
0.18 nΩ·m615.00 nΩ·m
0.18
961
10.2.3 Electrical Conductivity
0.06 106/cm Ω0.01 106/cm Ω
0.00666
0.63
10.2.4 Electron Affinity
19.20 kJ/mol48.00 kJ/mol
0
222.8
11 Thermal
11.1 Specific Heat
0.13 J/(kg K)0.19 J/(kg K)
0.11
3.6
11.2 Molar Heat Capacity
26.32 J/mol·K27.11 J/mol·K
16.443
62.7
11.3 Thermal Conductivity
46.10 W/m·K13.40 W/m·K
6.3
429
11.4 Critical Temperature
11.5 Thermal Expansion
29.90 µm/(m·K)12.10 µm/(m·K)
4.5
97
11.6 Enthalpy
11.6.1 Enthalpy of Vaporization
162.10 kJ/mol399.60 kJ/mol
7.32
799.1
11.6.2 Enthalpy of Fusion
4.27 kJ/mol6.20 kJ/mol
2.1
35.23
11.6.3 Enthalpy of Atomization
179.90 kJ/mol431.00 kJ/mol
61.5
837
11.7 Standard Molar Entropy
64.20 J/mol.K56.90 J/mol.K
9.5
198.1