68
Er
無法計量
週期
6
f
個質子
電子
個中子
68
68
99
一般屬性
原子序數
68
標準原子質量
167.259
品質編號
167
類別
鑭系元素
顏色
銀色
放射性
Erbium was named after Ytterby, a town in Sweden
晶體結構
簡單六角形
歷史
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.
每個外殼的電子
2, 8, 18, 30, 8, 2
電子排布
[Xe] 4f12 6s2
Er
The highest concentration of erbium in humans is in the bones
物理性質
物態
固體
密度
9.066 g/cm3
熔點
1802.15 K | 1529 °C | 2784.2 °F
沸點
3141.15 K | 2868 °C | 5194.4 °F
熔化熱
19.9 kJ/mol
汽化熱
285 kJ/mol
比熱容
0.168 J/g·K
地殼豐度
0.0003%
宇宙豐度
2×10-7%
Ultrapure
圖片來源: Images-of-elements
Ultrapure erbium with cut traces
CAS 編號
7440-52-0
Pubchem CID 編號
23980
原子性質
原子半徑
176 pm
共價半徑
189 pm
電負性
1.24 (鲍林标度)
電離電位
6.1077 eV
原子體積
18.4 cm3/mol
熱導率
0.143 W/cm·K
氧化態
3
應用
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
同位素
穩定同位素
162Er, 164Er, 166Er, 167Er, 168Er, 170Er
不穩定同位素
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