ユウロピウム
63
Eu
族
該当なし
周期
6
ブロック
f
陽子
電子
中性子
63
63
89
一般特性
原子番号
63
原子量
151.964
質量数
152
カテゴリ
ランタノイド
色
銀色
放射性
いいえ
Europium was named after Europe
結晶構造
体心立方格子
歴史
Europium was first found by Paul Émile Lecoq de Boisbaudran in 1890.
In 1896, French chemist Eugène-Antole Demarçay identified spectroscopic lines in ‘samarium' caused by europium.
He successfully isolated europium in 1901 using repeated crystallizations of samarium magnesium nitrate.
In 1896, French chemist Eugène-Antole Demarçay identified spectroscopic lines in ‘samarium' caused by europium.
He successfully isolated europium in 1901 using repeated crystallizations of samarium magnesium nitrate.
電子殻
2, 8, 18, 25, 8, 2
電子配置
[Xe] 4f7 6s2
Europium is the most reactive rare earth element
物理特性
相
固体
密度
5.243 g/㎝3
融点
1099.15 K | 826 °C | 1518.8 °F
沸点
1802.15 K | 1529 °C | 2784.2 °F
融解熱
9.2 kJ/mol
蒸発熱
175 kJ/mol
熱容量
0.182 J/g·K
地殻中における存在比
0.00018%
宇宙空間における存在比
5×10-8%
CAS登録番号
7440-53-1
PubChem CID番号
23981
原子特性
原子半径
180 pm
共有結合半径
198 pm
電気陰性度
1.2 (ポーリングの値)
イオン化エネルギー
5.6704 eV
モル体積
20.8 ㎝3/mol
熱伝導率
0.139 W/㎝·K
酸化数
2, 3
用途
Europium is used in the manufacture of fluorescent glass.
It is also used in the anti-counterfeiting phosphors in Euro banknotes.
Europium-doped plastic has been used as a laser material.
Europium isotopes are good neutron absorbers and are used in nuclear reactor control rods.
It is also used in the anti-counterfeiting phosphors in Euro banknotes.
Europium-doped plastic has been used as a laser material.
Europium isotopes are good neutron absorbers and are used in nuclear reactor control rods.
Europium is considered to be mildly toxic
同位体
安定同位体
151Eu, 153Eu不安定同位体
130Eu, 131Eu, 132Eu, 133Eu, 134Eu, 135Eu, 136Eu, 137Eu, 138Eu, 139Eu, 140Eu, 141Eu, 142Eu, 143Eu, 144Eu, 145Eu, 146Eu, 147Eu, 148Eu, 149Eu, 150Eu, 152Eu, 154Eu, 155Eu, 156Eu, 157Eu, 158Eu, 159Eu, 160Eu, 161Eu, 162Eu, 163Eu, 164Eu, 165Eu, 166Eu, 167Eu