Ербиум

68
Er
Група
Нема одговор
Периода
6
блок
f
Protons
Electrons
Neutrons
68
68
99
Општи Својства
Атомски број
68
Атомска тежина
167,259
Mass Number
167
Category
Ланта­ноид
Color
Silver
Radioactive
Не
Erbium was named after Ytterby, a town in Sweden
Кристална структура
Simple 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.
Electrons per shell
2, 8, 18, 30, 8, 2
Електронска конфигурација
[Xe] 4f12 6s2
Er
The highest concentration of erbium in humans is in the bones
Физички Својства
Фаза
Solid
Густина
9,066 g/cm3
Точка на топење
1802,15 K | 1529 °C | 2784,2 °F
Точка на вриење
3141,15 K | 2868 °C | 5194,4 °F
Топлина на топење
19,9 kJ/mol
Топлина на испарување
285 kJ/mol
Specific Heat Capacity
0,168 J/g·K
Abundance in Earth's crust
0,0003%
Abundance in Universe
2×10-7%
Ultrapure
Кредити на слика: Images-of-elements
Ultrapure erbium with cut traces
CAS Number
7440-52-0
PubChem CID Number
23980
Атомски Својства
Атомски полупречник
176 pm
Ковалентен полупречник
189 pm
Електронегативност
1,24 (Полингова скала)
Ionization Potential
6,1077 eV
Atomic Volume
18,4 cm3/mol
Thermal Conductivity
0,143 W/cm·K
Oxidation States
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
Isotopes
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