Erbium

68
Er
Golongan
n/a
Periode
6
Blok
f
Proton
Elektron
Neutron
68
68
99
Sifat Umum
Nomor atom
68
Massa atom
167,259
Nomor massa
167
Kategori
Lantanida
Warna
Perak
Radioaktif
Tidak
Erbium was named after Ytterby, a town in Sweden
Struktur kristal
Segienam Sederhana
Sejarah
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.
Elektron per kulit
2, 8, 18, 30, 8, 2
Konfigurasi elektron
[Xe] 4f12 6s2
Er
The highest concentration of erbium in humans is in the bones
Sifat Fisika
Fase
Solid
Kepadatan
9,066 g/cm3
Titik lebur
1802,15 K | 1529 °C | 2784,2 °F
Titik didih
3141,15 K | 2868 °C | 5194,4 °F
Kalor peleburan
19,9 kJ/mol
Kalor penguapan
285 kJ/mol
Kapasitas kalor molar
0,168 J/g·K
Kelimpahan di kerak bumi
0,0003%
Kelimpahan di alam semesta
2×10-7%
Ultrapure
Kredit Gambar: Images-of-elements
Ultrapure erbium with cut traces
Nomor CAS
7440-52-0
PubChem CID Number
23980
Sifat Atom
Jari-jari atom
176 pm
Jari-jari kovalen
189 pm
Elektronegativitas
1,24 (Skala Pauling)
Potensi Ionisasi
6,1077 eV
Volume atom
18,4 cm3/mol
Kondusivitas termal
0,143 W/cm·K
Bilangan oksidasi
3
Aplikasi
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
Isotop
Isotop stabil
162Er, 164Er, 166Er, 167Er, 168Er, 170Er
Isotop tidak stabil
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