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Neodymium Thallium Comparison

Neodymium
Thallium
Thallium Neodymium comparison


Periodic Table
Symbol
Nd   
Tl   
Group Number
1   
17
13   
5
Period Number
6   
6   
Block
f block   
p block   
Element Family
Lanthanide   
Post-​Transition   
CAS Number
7440008   
99+
7440280   
99+
Space Group Name
P63/mmc   
P63/mmc   
Space Group Number
194.00   
5
194.00   
5
Facts
Interesting Facts
  • Neodymium is not found free in nature, hence it is not a native metal.
  • Neodymium metal found in minerals like Monazite and Bastnaesite.
  
  • Compounds of Thallium metal are highly Toxic.
  • Thallium metal is being suspected as a human carcinogen.
  
Sources
Found in Minerals, Mining   
Found As a By-product, Ores of metals, Ores of Minerals   
History
  
  
Who Discovered
Carl Auer von Welsbach   
William Crookes   
Discovery
In 1885   
In 1861   
Abundance
  
  
Abundance In Universe
1 * 10-6 %   
16
5 * 10-9 %   
32
Abundance In Sun
~0.0000003 %   
24
~0.0000001 %   
26
Abundance In Meteorites
0.00 %   
30
0.00 %   
99+
Abundance In Earth's Crust
0.00 %   
20
0.00 %   
99+
Abundance In Oceans
0.00 %   
30
0.00 %   
34
Uses
Uses & Benefits
  • Neodymium-Iron-boron alloy is used to make permanent magnets.
  • It is used in microphones, Mp3 player, loudspeakers, mobile phones, etc.
  
  • 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.
  
Industrial Uses
Aerospace Industry, Electrical Industry, Electronic Industry   
Chemical Industry   
Medical Uses
NA   
Medical Research   
Other Uses
Alloys   
Alloys   
Biological Properties
  
  
Toxicity
Non Toxic   
Highly Toxic   
Present in Human Body
No   
Yes   
In Blood
Not Available   
0.00 Blood/mg dm-3   
34
In Bone
Not Available   
0.00 p.p.m.   
33
Physical Properties
Melting Point
1,010.00 °C   
99+
303.50 °C   
99+
Boiling Point
3,127.00 °C   
28
1,457.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery White   
Luster
Metallic   
NA   
Hardness
  
  
Mohs Hardness
Not Available   
1.20   
20
Brinell Hardness
265.00 MPa   
35
26.50 MPa   
99+
Vickers Hardness
345.00 MPa   
27
Not Available   
Speed of Sound
2,330.00 m/s   
38
818.00 m/s   
99+
Optical Properties
  
  
Allotropes
No   
No   
α Allotropes
Not Available   
Not Available   
β Allotropes
Not Available   
Not Available   
γ Allotropes
Not Available   
Not Available   
Chemical Properties
Chemical Formula
Nd   
Tl   
Isotopes
  
  
Known Isotopes
30   
9
32   
7
Electronegativity
  
  
Pauling Electronegativity
1.14   
99+
1.62   
21
Sanderson Electronegativity
Not Available   
2.25   
5
Allred Rochow Electronegativity
1.07   
32
1.44   
17
Mulliken-Jaffe Electronegativity
Not Available   
1.96   
6
Allen Electronegativity
Not Available   
1.79   
13
Electropositivity
  
  
Pauling Electropositivity
2.86   
13
2.38   
33
Ionization Energies
  
  
1st Energy Level
533.10 kJ/mol   
99+
589.40 kJ/mol   
99+
2nd Energy Level
1,040.00 kJ/mol   
99+
1,971.00 kJ/mol   
14
3rd Energy Level
2,130.00 kJ/mol   
99+
2,878.00 kJ/mol   
32
4th Energy Level
3,900.00 kJ/mol   
99+
Not Available   
Electrochemical Equivalent
1.79 g/amp-hr   
37
7.63 g/amp-hr   
2
Electron Work Function
3.20 eV   
34
3.84 eV   
28
Other Chemical Properties
Chemical Stability, Corrosion, Flammable, Ionization   
Corrosion, Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
60   
99+
81   
35
Electron Configuration
[Xe] 4f4 6s2   
[Xe] 4f14 5d10 6s2 6p1   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
DHCP-Crystal-Structure-of-Neodymium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
60   
99+
81   
35
Number of Neutrons
84   
40
123   
20
Number of Electrons
60   
99+
81   
35
Radius of an Atom
  
  
Atomic Radius
181.00 pm   
13
170.00 pm   
22
Covalent Radius
201.00 pm   
10
145.00 pm   
39
Van der Waals Radius
229.00 pm   
20
196.00 pm   
30
Atomic Weight
144.24 amu   
99+
204.38 amu   
31
Atomic Volume
20.60 cm3/mol   
18
17.20 cm3/mol   
31
Adjacent Atomic Numbers
  
  
Previous Element
Praseodymium
  
Mercury
  
Next Element
Promethium
  
Lead
  
Valence Electron Potential
43.40 (-eV)   
99+
9.60 (-eV)   
99+
Lattice Constant
365.80 pm   
30
345.66 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
1.61   
4
1.60   
6
Mechanical Properties
Density
  
  
Density At Room Temperature
7.01 g/cm3   
99+
11.85 g/cm3   
31
Density When Liquid (at m.p.)
6.89 g/cm3   
36
11.22 g/cm3   
13
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
21
16.90 (Pa)   
5
Vapor Pressure at 2000 K
101.00 (Pa)   
2
Not Available   
Elasticity properties
  
  
Shear Modulus
16.30 GPa   
38
2.80 GPa   
99+
Bulk Modulus
31.80 GPa   
37
43.00 GPa   
28
Young's Modulus
41.40 GPa   
40
8.00 GPa   
99+
Poisson Ratio
0.28   
16
0.45   
2
Other Mechanical Properties
NA   
Ductile, Sectile   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
7.00   
99+
11.85   
22
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Electrical Properties
  
  
Electrical Property
NA   
Conductor   
Resistivity
643.00 nΩ·m   
6
0.18 nΩ·m   
99+
Electrical Conductivity
0.02 106/cm Ω   
99+
0.06 106/cm Ω   
32
Electron Affinity
50.00 kJ/mol   
21
19.20 kJ/mol   
32
Thermal Properties
Specific Heat
0.19 J/(kg K)   
32
0.13 J/(kg K)   
39
Molar Heat Capacity
27.45 J/mol·K   
17
26.32 J/mol·K   
29
Thermal Conductivity
16.50 W/m·K   
99+
46.10 W/m·K   
33
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
9.60 µm/(m·K)   
99+
29.90 µm/(m·K)   
12
Enthalpy
  
  
Enthalpy of Vaporization
273.00 kJ/mol   
34
162.10 kJ/mol   
99+
Enthalpy of Fusion
7.14 kJ/mol   
99+
4.27 kJ/mol   
99+
Enthalpy of Atomization
322.00 kJ/mol   
32
179.90 kJ/mol   
99+
Standard Molar Entropy
71.50 J/mol.K   
13
64.20 J/mol.K   
19
Summary >>
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