Tantalum Samarium Comparison
Periodic Table
Symbol
Ta
Sm
Group Number
5
13
Not Available
Period Number
6
6
Block
d block
f block
Element Family
Transition Metal
Lanthanide
CAS Number
7440257
99+
7440199
99+
Space Group Name
Im_ 3m
R_ 3m
Space Group Number
229.00
1
166.00
6
Facts
Interesting Facts
- Tantalum metal is known as corrosion resistance.
- Tantalum metal can easily fabricated and It is a good conductor of heat and electricity.
- Samarium metals helps stimulating body metabolism.
- Samarium metals was 1st observed by Jean Charles Galissard de Marignac in Dydimia in 1853.
Sources
Found in Minerals, Mining, Ores of Minerals
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Anders Gustaf Ekeberg
Lecoq de Boisbaudran
Discovery
In 1802
In 1879
Abundance
Abundance In Universe
8 * 10-9 %
31
5 * 10-7 %
19
Abundance In Sun
~-9999 %
~0.0000001 %
26
Abundance In Meteorites
0.00 %
99+
0.00 %
37
Abundance In Earth's Crust
0.00 %
37
0.00 %
29
Abundance In Oceans
0.00 %
31
0.00 %
40
Uses
Uses & Benefits
- Tantalum metal is mainly used in the manufacturing of electron components. Its Oxide layer acts as an insulator.
- Tantalum metal is also used in surgical transplant like replacement of bone, skull plates and as a woven gauze.
- Magnets of Samarium cobalt alloy are stronger than that of Iron and hence, they are used in microwave application.
- Samarium metal also used in optical lasers and infrared absorbing glasses and as a neutron absorber.
Industrial Uses
Electrical Industry, Electronic Industry
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Alloys
Alloys, In Nuclear Reactors
Biological Properties
Toxicity
Low Toxic
Slightly Toxic
Present in Human Body
Yes
Yes
In Blood
Not Available
0.01 Blood/mg dm-3
22
In Bone
0.03 p.p.m.
28
Not Available
Physical Properties
Melting Point
2,996.00 °C
4
1,072.00 °C
99+
Boiling Point
5,425.00 °C
4
1,900.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Gray Blue
Silvery White
Luster
Metallic
Lustrous
Hardness
Mohs Hardness
6.50
5
Not Available
Brinell Hardness
440.00 MPa
28
441.00 MPa
27
Vickers Hardness
870.00 MPa
12
412.00 MPa
24
Speed of Sound
3,400.00 m/s
22
2,130.00 m/s
99+
Optical Properties
Reflectivity
78.00 %
6
Not Available
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
Ta
Sm
Isotopes
Known Isotopes
31
8
30
9
Electronegativity
Pauling Electronegativity
1.50
27
1.17
40
Allred Rochow Electronegativity
1.33
22
1.07
32
Allen Electronegativity
1.34
33
Not Available
Electropositivity
Pauling Electropositivity
2.50
27
2.83
14
Ionization Energies
1st Energy Level
761.00 kJ/mol
18
544.50 kJ/mol
99+
2nd Energy Level
1,500.00 kJ/mol
40
1,070.00 kJ/mol
99+
3rd Energy Level
Not Available
2,260.00 kJ/mol
99+
4th Energy Level
Not Available
3,990.00 kJ/mol
37
Electrochemical Equivalent
1.35 g/amp-hr
99+
1.87 g/amp-hr
34
Electron Work Function
4.25 eV
21
2.70 eV
99+
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes
Atomic Properties
Atomic Number
73
99+
62
99+
Electron Configuration
[Xe] 4f14 5d3 6s2
[Xe] 4f6 6s2
Crystal Structure
Body Centered Cubic (BCC)
Rhombohedral (RHO)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
RHO-Crystal-Structure-of-Samarium.jpg#100
Atom
Number of Protons
73
99+
62
99+
Number of Neutrons
108
28
88
39
Number of Electrons
73
99+
62
99+
Radius of an Atom
Atomic Radius
146.00 pm
35
180.00 pm
14
Covalent Radius
170.00 pm
25
198.00 pm
13
Van der Waals Radius
200.00 pm
28
229.00 pm
20
Atomic Weight
180.95 amu
38
150.36 amu
99+
Atomic Volume
10.90 cm3/mol
99+
19.95 cm3/mol
19
Adjacent Atomic Numbers
Valence Electron Potential
110.00 (-eV)
7
44.80 (-eV)
37
Lattice Constant
330.13 pm
99+
362.10 pm
33
Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
16.69 g/cm3
18
7.52 g/cm3
99+
Density When Liquid (at m.p.)
15.00 g/cm3
9
7.16 g/cm3
32
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
0.94 (Pa)
9
Vapor Pressure at 2000 K
0.00 (Pa)
31
Not Available
Elasticity properties
Shear Modulus
69.00 GPa
13
19.50 GPa
34
Bulk Modulus
200.00 GPa
8
37.80 GPa
35
Young's Modulus
186.00 GPa
13
49.70 GPa
37
Poisson Ratio
0.34
10
0.27
19
Other Mechanical Properties
Ductile
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
16.65
11
7.52
99+
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
131.00 nΩ·m
25
0.94 nΩ·m
99+
Electrical Conductivity
0.08 106/cm Ω
27
0.01 106/cm Ω
99+
Electron Affinity
31.00 kJ/mol
29
50.00 kJ/mol
21
Thermal Properties
Specific Heat
0.14 J/(kg K)
37
0.20 J/(kg K)
31
Molar Heat Capacity
25.36 J/mol·K
99+
29.54 J/mol·K
7
Thermal Conductivity
57.50 W/m·K
27
13.30 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
6.30 µm/(m·K)
99+
12.70 µm/(m·K)
30
Enthalpy
Enthalpy of Vaporization
753.10 kJ/mol
2
166.40 kJ/mol
99+
Enthalpy of Fusion
31.40 kJ/mol
3
8.62 kJ/mol
40
Enthalpy of Atomization
782.00 kJ/mol
3
209.00 kJ/mol
99+
Standard Molar Entropy
41.50 J/mol.K
37
69.60 J/mol.K
15
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