Erbium

68
Er
Gruppe
n/a
Periode
6
Blok
f
Protons
Electrons
Neutrons
68
68
99
General Properties
Atomnummer
68
Atommasse
167,259
Mass Number
167
Kategori
Lantanider
Farve
Silver
Radioactive
Nej
Erbium was named after Ytterby, a town in Sweden
Krystalstruktur
Simpel Hexagonal
History
Erbium was discovered in 1843 by Swedish chemist Carl Gustaf Mosander, who detected it as an impurity in yttria.

Using ammonium hydroxide he precipitated fractions of different basicity from yttria.

In these fractions he found that the fraction that contained the pink color was erbium.
Elektroner i hver skal
2, 8, 18, 30, 8, 2
Elektronkonfiguration
[Xe] 4f12 6s2
Er
The highest concentration of erbium in humans is in the bones
Physical Properties
Tilstandsform
Fast stof
Massefylde
9,066 g/cm3
Smeltepunkt
1802,15 K | 1529 °C | 2784,2 °F
Kogepunkt
3141,15 K | 2868 °C | 5194,4 °F
Smeltevarme
19,9 kJ/mol
Fordampningsvarme
285 kJ/mol
Varmefylde
0,168 J/g·K
Abundance in Earth's crust
0,0003%
Abundance in Universe
2×10-7%
Ultrapure
Billede akkrediteringer: Images-of-elements
Ultrapure erbium with cut traces
CAS Number
7440-52-0
PubChem CID Number
23980
Atomic Properties
Atomradius
176 pm
Kovalent radius
189 pm
Elektronegativitet
1,24 (Paulings skala)
Ionization Potential
6,1077 eV
Atomic Volume
18,4 cm3/mol
Varmeledningsevne
0,143 W/cm·K
Oxidationstrin
3
Applications
Erbium is used in photographic filters to absorb infrared light.

Erbium oxide gives a pink color and has been used as a colorant in glasses and porcelain enamel glazes.

It is also used in nuclear technology in neutron-absorbing control rods.

Erbium is used in alloys especially with vanadium to decrease the hardness of metals.
Erbium is considered to be moderately toxic
Isotoper
Stable Isotopes
162Er, 164Er, 166Er, 167Er, 168Er, 170Er
Unstable Isotopes
143Er, 144Er, 145Er, 146Er, 147Er, 148Er, 149Er, 150Er, 151Er, 152Er, 153Er, 154Er, 155Er, 156Er, 157Er, 158Er, 159Er, 160Er, 161Er, 163Er, 165Er, 169Er, 171Er, 172Er, 173Er, 174Er, 175Er, 176Er, 177Er