de en fr hr it es
Neighborhood
 
 
 
Ho
67
Er
68
Tm
69
Es
99
Fm
100
Md
101

 

Periodic table

de  German

Erbium

en  English

Erbium

fr  French

Erbium

hr  Croatian

Erbij

it  Italian

Erbio

es  Spanish

Erbio

 

Er
Er
Erbium

PERIODIC TABLE OF THE ELEMENTS

ERBIUM

TRANSITION ELEMENT:
LANTHANIDE

 

Atomic number:68

Group numbers:3

Period:6

Electronic configuration:[Xe] 4f12 6s2

Formal oxidation number:+3

Electronegativities:1.24

Atomic radius / pm:173.4

Relative atomic mass:167.259 ± 0.003

 

Erbium was discovered by Carl Gustaf Mosander (SE) in 1843. Named after Ytterby, a village in Sweden. It is a soft, malleable, silvery metal that reacts slowly with water and dissolves in acids. Metal ignites and burns readily. Erbium is found with other heavier rare earths in xenotime and euxenite. Erbium oxide is used in ceramics to obtain a pink glaze. There are also a few uses in the nuclear industry and as an alloying agent for other exotic metals.

PHYSICAL PROPERTIES

Density / g dm-3:9066 (298 K)

Molar volume / cm3mol-1:18.45 (298 K)

Electrical resistivity / μΩcm:107 (20 °C)

THERMAL PROPERTIES

Thermal conductivity / W m-1K-1:14.3

Melting point / °C:1529

Boiling point / °C:2868

Heat of fusion / kJ mol-1:17.2

Heat of vaporization / kJ mol-1:280

Heat of atomization / kJ mol-1:318.32

IONIZATION ENERGIES

First ionization energy / kJ mol-1:589.31

Second ionization energy / kJ mol-1:1151.08

Third ionization energy / kJ mol-1:2194.09

ABUNDANCE OF ELEMENTS

in the atmosphere / ppm:-

in the Earth's crust / ppm:2.2

in the oceans / ppm:0.0000002

CRYSTALLOGRAPHIC DATA

hexagonal

Crystal structure:

hexagonal

Unit-cell dimensions / pm:

a=355.88, c=558.74

Space group:

P63/mmc

ISOTOPES

IsotopeRelative atomic massMass percent (%)
162Er161.928775(4)0.14(1)
164Er163.929197(4)1.61(2)
166Er165.930290(3)33.6(2)
167Er166.932045(3)22.95(15)
168Er167.932368(3)26.8(2)
170Er169.935460(3)14.9(2)

REDUCTION POTENTIALS

Balanced half-reaction Eo / V

 

67 Holmium <=
68 Erbium
=> 69 Thulium