Elements
68

Er

Erbium

Erbium (Er) is a silvery coloured metal that has the atomic number 68 in the periodic table. It is a Lanthanide metal. It has the symbol Er.

Erbium was isolated in 1843 by Carl Mosander who obtained two metal oxides from Yttria. One of these was the pink erbium oxide. It was extracted in 1878 by Jean-Charles Galissard de Marignac. Erbium like Holmium is used as a neutron absorber in nuclear reactors. The oxide Erbia is used as a pink glaze in glass. It is a solid metal at room temperature with a melting point of 1529°c and a boiling point of 2868°c.

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FAQ's

What is the Melting Point for Erbium?

Erbium has a Melting Point of 1529°F, meaning at 1529°F it will turn to a liquid.

What is the Boiling Point for Erbium?

Erbium has a Boiling Point of 2868°F, meaning at 2868°F it will turn to a Gas.

What is the Electronegativity of Erbium?

Erbium's Electronegativty is 1.24. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Erbium?

Erbium has a Heat of Vaporization of 261 kJ/mol.

Uses

Erbium oxide is used in ceramics to obtain a pink glaze. Also a few uses in the nuclear industry and as an alloying agent for other exotic metals. For example, it increases the malleability of vanadium.

Sources

Found with other heavier rare earths in xenotime and euxerite.

68
Protons
68
Electrons
99
Neutrons

Er

Element Symbol
Er
Atomic Weight
167.259
Atomic Number
68
State
Solid
Melting Point
Unknown
1529
°C
Boiling Point
2868
Unknown
°C
Heat of Vaporization
261
Unknown
kJ/mol
Crystal Structure
Hexagonal
Thermoconductivity
0.143
Unknown
W/cmK
Shells
2,8,18,30,8,2
Group
Lanthanide
Period
6
Block
F Block
Orbitals
[Xe] 4f12 6s2
Coefficient of Thermal Expansion
9.4 10^-6 K^-1
Covalent Radius
1.57 Å
Density at 293K
9.05 g/cm³
Electrical Conductivity
0.0117 10^6/cm ohm
First Ionization Potential
6.1078 V
Second Ionization Potential
11.929 V
Third Ionization Potential
22.739 V
Ionic Radius
1.00 (+3) Å
Oxydation States
3
Lattice Parameter
3.5589 Å
Lattice Parameter 2
--
Lattice Parameter 3
5.5511 Å
Pronounced

UR-bi-em

Discovered by

Carl Mosander

Discovery date

1843

Orbital configuration
2,8,18,30,8,2

Download the Periodic Table

Explore Other Lanthanides

151.964
63

Eu

Europium
145
61

Pm

Promethium
150.36
62

Sm

Samarium
157.25
64

Gd

Gadolinium
138.905
57

La

Lanthanum
158.925
65

Tb

Terbium
140.116
58

Ce

Cerium
174.967
71

Lu

Lutetium
173.045
70

Yb

Ytterbium
168.934
69

Tm

Thulium
162.5
66

Dy

Dysprosium
164.93
67

Ho

Holmium
144.24
60

Nd

Neodymium
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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