テルビウム

65
Tb
該当なし
周期
6
ブロック
f
陽子
電子
中性子
65
65
94
一般特性
原子番号
65
原子量
158.92535
質量数
159
カテゴリ
ランタノイド
銀色
放射性
いいえ
Terbium was named after Ytterby, a town in Sweden
結晶構造
六方最密構造
歴史
Terbium 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 was essentially colorless in solution, but gave a brown-tinged oxide was terbium.
電子殻
2, 8, 18, 27, 8, 2
電子配置
[Xe] 4f9 6s2
Tb
Terbium is soft enough to be cut with a knife
物理特性
固体
密度
8.229 g/㎝3
融点
1629.15 K | 1356 °C | 2472.8 °F
沸点
3503.15 K | 3230 °C | 5846 °F
融解熱
10.8 kJ/mol
蒸発熱
295 kJ/mol
熱容量
0.182 J/g·K
地殻中における存在比
0.000093%
宇宙空間における存在比
5×10-8%
Pure
画像の出典: Images-of-elements
Pure terbium
CAS登録番号
7440-27-9
PubChem CID Number
23958
原子特性
原子半径
177 pm
共有結合半径
194 pm
電気陰性度
1.2 (ポーリングの値)
イオン化エネルギー
5.8638 eV
モル体積
19.20 ㎝3/mol
熱伝導率
0.111 W/㎝·K
酸化数
1, 3, 4
用途
Terbium is used in alloys and in the production of electronic devices.

It is also used as a dopant for materials in solid-state devices and optical fibers.

Terbium oxide is in fluorescent lamps and TV tubes.

The brilliant fluorescence allows terbium to be used as a probe in biochemistry.
Terbium is considered to be moderately toxic
同位体
安定同位体
159Tb
不安定同位体
136Tb, 137Tb, 138Tb, 139Tb, 140Tb, 141Tb, 142Tb, 143Tb, 144Tb, 145Tb, 146Tb, 147Tb, 148Tb, 149Tb, 150Tb, 151Tb, 152Tb, 153Tb, 154Tb, 155Tb, 156Tb, 157Tb, 158Tb, 160Tb, 161Tb, 162Tb, 163Tb, 164Tb, 165Tb, 166Tb, 167Tb, 168Tb, 169Tb, 170Tb, 171Tb