Erbium

68
Er
Grupp
n/a
Period
6
Block
f
Protoner
Elektroner
Neutroner
68
68
99
Generella Egenskaper
Atomnummer
68
Atommassa
167,259
Masstal
167
Kategori
Lantanoider
Färg
Silver
Radioaktiv
Nej
Erbium was named after Ytterby, a town in Sweden
Kristallstruktur
Enkelt hexagonalt
Historia
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 per skal
2, 8, 18, 30, 8, 2
Elektronkonfiguration
[Xe] 4f12 6s2
Er
The highest concentration of erbium in humans is in the bones
Fysikaliska Egenskaper
Aggregationstillstånd
Fast
Densitet
9,066 g/cm3
Smältpunkt
1802,15 K | 1529 °C | 2784,2 °F
Kokpunkt
3141,15 K | 2868 °C | 5194,4 °F
Smältvärme
19,9 kJ/mol
Ångbildningsvärme
285 kJ/mol
Specifik värmekapacitet
0,168 J/g·K
Abundance in Earth's crust
0,0003%
Abundance in Universe
2×10-7%
Ultrapure
Bildkrediter: Images-of-elements
Ultrapure erbium with cut traces
CAS Number
7440-52-0
PubChem CID Number
23980
Atomära Egenskaper
Atomradie
176 pm
Kovalent radie
189 pm
Elektronegativitet
1,24 (Paulingskalan)
Jonisationspotential
6,1077 eV
Molvolym
18,4 cm3/mol
Värmeledningsförmåga
0,143 W/cm·K
Oxidationstillstånd
3
Användningsområden
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
Stabila isotoper
162Er, 164Er, 166Er, 167Er, 168Er, 170Er
Instabila isotoper
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