Elements
62

Sm

Samarium

Samarium (Sm) is a silvery coloured metal that has the atomic number 62 in the periodic table. It is a Lanthanide metal. It has the symbol Sm.

Samarium was the first element to be named after a person. It was discovered by Paul Émile Lecoq de Boisbaudran in 1879 and takes its name from the Russian mining engineer Samarsky. Samarium is known to bond to alcohol molecules and has been proven to reduce its intoxicating effects. Samarium ignites readily in air at temperatures over 150°c and forms yellow coloured salts. Samarium has its main use in creating alloys with cobalt for headphones and small motors. Radioactive Samarium 153 is used in the treatment of cancers. It is a solid metal at room temperature with a melting point of 1072°c and a boiling point of 1794°c.

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FAQ's

What is the Melting Point for Samarium?

Samarium has a Melting Point of 1074°F, meaning at 1074°F it will turn to a liquid.

What is the Boiling Point for Samarium?

Samarium has a Boiling Point of 1794°F, meaning at 1794°F it will turn to a Gas.

What is the Electronegativity of Samarium?

Samarium's Electronegativty is 1.17. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Samarium?

Samarium has a Heat of Vaporization of 166.4 kJ/mol.

Uses

It is used in the electronics and ceramics industries. It is easily magnetized and very difficult to demagnetize. This suggests important future applications in solid-state and superconductor technologies.

Sources

Found with other rare earths in monazite sand. The sand is often 50% rare earths by weight and 2.8% samarium.

62
Protons
62
Electrons
88
Neutrons

Sm

Element Symbol
Sm
Atomic Weight
150.36
Atomic Number
62
State
Solid
Melting Point
Unknown
1074
°C
Boiling Point
1794
Unknown
°C
Heat of Vaporization
166.4
Unknown
kJ/mol
Crystal Structure
Rhombohedral
Thermoconductivity
0.133
Unknown
W/cmK
Shells
2,8,18,24,8,2
Group
Lanthanide
Period
6
Block
F Block
Orbitals
[Xe] 4f6 6s2
Coefficient of Thermal Expansion
--
Covalent Radius
1.62 Å
Density at 293K
7.54 g/cm³
Electrical Conductivity
0.00956 10^6/cm ohm
First Ionization Potential
5.6437 V
Second Ionization Potential
11.069 V
Third Ionization Potential
23.423 V
Ionic Radius
1.08 (+3) Å
Oxydation States
(3),2
Lattice Parameter
8.996 Å
Lattice Parameter 2
--
Lattice Parameter 3
5.6938 Å
Pronounced

seh-MER-i-em

Discovered by

Paul Émile Lecoq de Boisbaudran

Discovery date

1879

Orbital configuration
2,8,18,24,8,2

Download the Periodic Table

Explore Other Lanthanides

140.116
58

Ce

Cerium
167.259
68

Er

Erbium
151.964
63

Eu

Europium
144.24
60

Nd

Neodymium
162.5
66

Dy

Dysprosium
158.925
65

Tb

Terbium
174.967
71

Lu

Lutetium
157.25
64

Gd

Gadolinium
145
61

Pm

Promethium
164.93
67

Ho

Holmium
173.045
70

Yb

Ytterbium
168.934
69

Tm

Thulium
138.905
57

La

Lanthanum
140.908
59

Pr

Praseodymium
The lanthanide series contains 15 metallic elements from number 57 (lanthanum) to 71 (lutetium). They are located in group 3 and in the f-block of period six in the periodic table.
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Promethium

61
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Europium

63