66
Dy
無法計量
週期
6
f
個質子
電子
個中子
66
66
97
一般屬性
原子序數
66
標準原子質量
162.5
品質編號
163
類別
鑭系元素
顏色
銀色
放射性
From the Greek word dysprositos, meaning hard to get at
晶體結構
簡單六角形
歷史
French chemist Paul Émile Lecoq de Boisbaudran, while working with holmium oxide, separated dysprosium oxide from it in Paris in 1886.

His procedure for isolating the dysprosium involved dissolving dysprosium oxide in acid, then adding ammonia to precipitate the hydroxide.

It was not isolated in pure form until the development of ion exchange techniques in the 1950s.
每個外殼的電子
2, 8, 18, 28, 8, 2
電子排布
[Xe] 4f10 6s2
Dy
Naturally occurring dysprosium is composed of 7 isotopes
物理性質
物態
固體
密度
8.55 g/cm3
熔點
1680.15 K | 1407 °C | 2564.6 °F
沸點
2840.15 K | 2567 °C | 4652.6 °F
熔化熱
11.1 kJ/mol
汽化熱
280 kJ/mol
比熱容
0.17 J/g·K
地殼豐度
0.00062%
宇宙豐度
2×10-7%
Ultrapure
圖片來源: Images-of-elements
Ultrapure dysprosium dendrites
CAS 編號
7429-91-6
Pubchem CID 編號
23912
原子性質
原子半徑
178 pm
共價半徑
192 pm
電負性
1.22 (鲍林标度)
電離電位
5.9389 eV
原子體積
19.0 cm3/mol
熱導率
0.107 W/cm·K
氧化態
2, 3
應用
Dysprosium oxide-nickel cermets are used in neutron-absorbing control rods in nuclear reactors.

Dysprosium is used in data storage applications such as compact discs and hard discs.

It is also used in dosimeters for measuring ionizing radiation.

Dysprosium iodide and dysprosium bromide are used in high intensity metal-halide lamps.
Dysprosium is considered to be moderately toxic
同位素
穩定同位素
156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy, 164Dy
不穩定同位素
138Dy, 139Dy, 140Dy, 141Dy, 142Dy, 143Dy, 144Dy, 145Dy, 146Dy, 147Dy, 148Dy, 149Dy, 150Dy, 151Dy, 152Dy, 153Dy, 154Dy, 155Dy, 157Dy, 159Dy, 165Dy, 166Dy, 167Dy, 168Dy, 169Dy, 170Dy, 171Dy, 172Dy, 173Dy