Symbol
Sm
Group Number
3
Rank: 15 (Overall)
0
17
👆🏻
Period Number
6
Rank: 2 (Overall)
2
7
👆🏻
Block
f block
Element Family
Lanthanide
CAS Number
7440199
Rank: 60 (Overall)
7429905
54386242
👆🏻
Space Group Name
R_ 3m
Space Group Number
166.00
Rank: 9 (Overall)
11
276
👆🏻
Interesting Facts
- 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
History
Who Discovered
Lecoq de Boisbaudran
Discovery
In 1879
Abundance
Abundance In Universe
0.00 %
Rank: 20 (Overall)
0
0.11
👆🏻
Abundance In Sun
0.00 %
Rank: 26 (Overall)
0
0.1
👆🏻
Abundance In Meteorites
0.00 %
Rank: 37 (Overall)
0
22
👆🏻
Abundance In Earth's Crust
0.00 %
Rank: 29 (Overall)
1E-37
8.1
👆🏻
Abundance In Oceans
0.00 %
Rank: 40 (Overall)
0
1.1
👆🏻
Abundance In Humans
0.00 %
Rank: 24 (Overall)
0
1.4
👆🏻
Uses & Benefits
- 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
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
Medical Uses
-
Other Uses
Alloys, In Nuclear Reactors
Biological Properties
Toxicity
Slightly Toxic
Present in Human Body
✔
✘
27% - Lanthanide Series Metals have it !
In Blood
0.01 Blood/mg dm-3
Rank: 22 (Overall)
0
1970
👆🏻
In Bone
0.00 p.p.m.
Rank: 41 (Overall)
0
170000
👆🏻
Melting Point
1,072.00 °C
Rank: 41 (Overall)
-38.83
3410
👆🏻
Boiling Point
1,900.00 °C
Rank: 54 (Overall)
0
5660
👆🏻
Appearance
Physical State
Solid
Color
Silvery White
Luster
Lustrous
Hardness
Mohs Hardness
5.50
Rank: 7 (Overall)
0.2
8.5
👆🏻
Brinell Hardness
441.00 MPa
Rank: 32 (Overall)
0.14
3490
👆🏻
Vickers Hardness
412.00 MPa
Rank: 40 (Overall)
0
3920
👆🏻
Speed of Sound
2,130.00 m/s
Rank: 59 (Overall)
818
16200
👆🏻
Optical Properties
Refractive Index
1.80
Rank: 22 (Overall)
0.155
3.41
👆🏻
Reflectivity
65.00 %
Rank: 18 (Overall)
5
97
👆🏻
Allotropes
✔
✘
No - Lanthanide Series Metals has it !
α Allotropes
-
β Allotropes
-
γ Allotropes
-
Chemical Formula
Sm
Isotopes
Known Isotopes
30
Rank: 9 (Overall)
0
38
👆🏻
Electronegativity
Pauling Electronegativity
1.17
Rank: 41 (Overall)
0
2.6
👆🏻
Sanderson Electronegativity
1.17
Rank: 33 (Overall)
0.22
2.56
👆🏻
Allred Rochow Electronegativity
1.07
Rank: 33 (Overall)
0.86
1.9
👆🏻
Mulliken-Jaffe Electronegativity
1.17
Rank: 40 (Overall)
0.62
2.48
👆🏻
Allen Electronegativity
1.17
Rank: 50 (Overall)
0.659
2.7
👆🏻
Electropositivity
Pauling Electropositivity
2.83
Rank: 14 (Overall)
1.46
3.3
👆🏻
Ionization Energies
1st Energy Level
544.50 kJ/mol
Rank: 72 (Overall)
375.7
26130
👆🏻
2nd Energy Level
1,070.00 kJ/mol
Rank: 76 (Overall)
392.8
28750
👆🏻
3rd Energy Level
2,260.00 kJ/mol
Rank: 61 (Overall)
392.8
34230
👆🏻
4th Energy Level
3,990.00 kJ/mol
Rank: 47 (Overall)
375.7
37066
👆🏻
5th Energy Level
5,445.00 kJ/mol
Rank: 65 (Overall)
392
97510
👆🏻
6th Energy Level
5,445.00 kJ/mol
Rank: 78 (Overall)
1007
105800
👆🏻
7th Energy level
5,445.00 kJ/mol
Rank: 68 (Overall)
1007
114300
👆🏻
8th Energy Level
5,400.00 kJ/mol
Rank: 68 (Overall)
730
125300
👆🏻
9th Energy Level
5,440.00 kJ/mol
Rank: 66 (Overall)
1007
134700
👆🏻
10th Energy Level
5,445.00 kJ/mol
Rank: 65 (Overall)
392
144300
👆🏻
11th Energy Level
5,445.00 kJ/mol
Rank: 70 (Overall)
392
169988
👆🏻
12th Energy Level
5,440.00 kJ/mol
Rank: 73 (Overall)
0
189368
👆🏻
13th Energy Level
5,445.00 kJ/mol
Rank: 62 (Overall)
1007
76015
👆🏻
14th Energy Level
5,450.00 kJ/mol
Rank: 49 (Overall)
380
86450
👆🏻
15th Energy Level
54,450.00 kJ/mol
Rank: 62 (Overall)
33000
100700
👆🏻
16th Energy Level
54,400.00 kJ/mol
Rank: 50 (Overall)
375.7
109480
👆🏻
17th Energy Level
544.50 kJ/mol
Rank: 76 (Overall)
375.7
122200
👆🏻
18th Energy Level
5,445.00 kJ/mol
Rank: 64 (Overall)
0
134810
👆🏻
19th Energy Level
544.50 kJ/mol
Rank: 74 (Overall)
375.7
148700
👆🏻
20th Energy Level
624.00 kJ/mol
Rank: 43 (Overall)
0
171200
👆🏻
21st Energy Level
544.50 kJ/mol
Rank: 78 (Overall)
375.7
179100
👆🏻
22nd Energy Level
624.00 kJ/mol
Rank: 37 (Overall)
330
184900
👆🏻
23rd Energy Level
544.50 kJ/mol
Rank: 77 (Overall)
357.6
198800
👆🏻
24th Energy Level
544.50 kJ/mol
Rank: 69 (Overall)
297.3
195200
👆🏻
25th Energy Level
544.00 kJ/mol
Rank: 65 (Overall)
0
121900
👆🏻
26th Energy Level
544.50 kJ/mol
Rank: 73 (Overall)
357.6
127700
👆🏻
27th Energy Level
544.50 kJ/mol
Rank: 69 (Overall)
0
133800
👆🏻
28th Energy Level
544.50 kJ/mol
Rank: 72 (Overall)
297.3
139800
👆🏻
29th Energy Level
544.50 kJ/mol
Rank: 75 (Overall)
0
148100
👆🏻
30th Energy Level
544.00 kJ/mol
Rank: 69 (Overall)
0
154500
👆🏻
Electrochemical Equivalent
1.87 g/amp-hr
Rank: 38 (Overall)
0.16812
8.3209
👆🏻
Electron Work Function
2.70 eV
Rank: 52 (Overall)
2.14
6
👆🏻
Other Chemical Properties
Ionization, Radioactive Isotopes
Atomic Number
62
Rank: 54 (Overall)
3
117
👆🏻
Electron Configuration
[Xe] 4f6 6s2
Crystal Structure
Rhombohedral (RHO)
Crystal Lattice
Atom
Number of Protons
62
Rank: 53 (Overall)
3
117
👆🏻
Number of Neutrons
88
Rank: 40 (Overall)
4
285
👆🏻
Number of Electrons
62
Rank: 53 (Overall)
3
117
👆🏻
Radius of an Atom
Atomic Radius
180.00 pm
Rank: 16 (Overall)
0
348
👆🏻
Covalent Radius
198.00 pm
Rank: 13 (Overall)
0
260
👆🏻
Van der Waals Radius
229.00 pm
Rank: 25 (Overall)
0
348
👆🏻
Atomic Weight
150.36 amu
Rank: 48 (Overall)
6.94
294
👆🏻
Atomic Volume
19.95 cm3/mol
Rank: 31 (Overall)
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
44.80 (-eV)
Rank: 38 (Overall)
0
392.42
👆🏻
Lattice Constant
362.10 pm
Rank: 37 (Overall)
0
891.25
👆🏻
Lattice Angles
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.62
Rank: 15 (Overall)
0.423
1.9
👆🏻
Density
Density At Room Temperature
7.52 g/cm3
Rank: 58 (Overall)
0.534
40.7
👆🏻
Density When Liquid (at m.p.)
7.16 g/cm3
Rank: 61 (Overall)
0.512
41
👆🏻
Tensile Strength
50.00 MPa
Rank: 38 (Overall)
0.1
11000
👆🏻
Viscosity
0.00
Rank: 25 (Overall)
1.5E-05
0.0035
👆🏻
Vapor Pressure
Vapor Pressure at 1000 K
0.94 (Pa)
Rank: 9 (Overall)
0
121
👆🏻
Vapor Pressure at 2000 K
0.00 (Pa)
Rank: 29 (Overall)
0
774
👆🏻
Elasticity properties
Shear Modulus
19.50 GPa
Rank: 44 (Overall)
1.3
222
👆🏻
Bulk Modulus
37.80 GPa
Rank: 43 (Overall)
0
462
👆🏻
Young's Modulus
49.70 GPa
Rank: 40 (Overall)
0
528
👆🏻
Poisson Ratio
0.27
Rank: 19 (Overall)
0.032
0.47
👆🏻
Other Mechanical Properties
-
Magnetic Characteristics
Specific Gravity
7.52
Rank: 57 (Overall)
0.53
4500
👆🏻
Magnetic Ordering
Paramagnetic
Permeability
0.00 H/m
Rank: 9 (Overall)
1.25643E-06
0.0063
👆🏻
Susceptibility
0.00
Rank: 24 (Overall)
-0.000166
200000
👆🏻
Electrical Properties
Electrical Property
Conductor
Resistivity
0.94 nΩ·m
Rank: 73 (Overall)
0.1
961
👆🏻
Electrical Conductivity
0.01 106/cm Ω
Rank: 63 (Overall)
0
0.63
👆🏻
Electron Affinity
50.00 kJ/mol
Rank: 26 (Overall)
0
222.8
👆🏻
Specific Heat
0.20 J/(kg K)
Rank: 32 (Overall)
0.1
3.6
👆🏻
Molar Heat Capacity
29.54 J/mol·K
Rank: 9 (Overall)
13.1
62.7
👆🏻
Thermal Conductivity
13.30 W/m·K
Rank: 59 (Overall)
0
429
👆🏻
Critical Temperature
1,345.00 K
Rank: 44 (Overall)
26.3
3695
👆🏻
Thermal Expansion
12.70 µm/(m·K)
Rank: 39 (Overall)
4.5
97
👆🏻
Enthalpy
Enthalpy of Vaporization
166.40 kJ/mol
Rank: 65 (Overall)
7.32
799.1
👆🏻
Enthalpy of Fusion
8.62 kJ/mol
Rank: 46 (Overall)
2.1
35.23
👆🏻
Enthalpy of Atomization
209.00 kJ/mol
Rank: 55 (Overall)
61.5
837
👆🏻
Standard Molar Entropy
69.60 J/mol.K
Rank: 15 (Overall)
9.5
198.1
👆🏻