インジウム
49
In
族
13
周期
5
ブロック
p
陽子
電子
中性子
49
49
66
一般特性
原子番号
49
原子量
114.818
質量数
115
カテゴリ
卑金属
色
銀色
放射性
いいえ
From the brilliant indigo line in its spectrum
結晶構造
体心 正方晶系
歴史
Ferdinand Reich and Hieronymous Theodor Richter first identified indium in sphalerite by its bright indigo-blue spectroscopic emission line.
As no element was known with a bright blue emission they concluded that a new element was present in the minerals.
Richter went on to isolate the metal in 1864.
As no element was known with a bright blue emission they concluded that a new element was present in the minerals.
Richter went on to isolate the metal in 1864.
電子殻
2, 8, 18, 18, 3
電子配置
[Kr] 4d10 5s2 5p1
When it is bent, indium emits a high-pitched 'cry'
物理特性
相
固体
密度
7.31 g/㎝3
融点
429.75 K | 156.6 °C | 313.88 °F
沸点
2345.15 K | 2072 °C | 3761.6 °F
融解熱
3.26 kJ/mol
蒸発熱
230 kJ/mol
熱容量
0.233 J/g·K
地殻中における存在比
0.000016%
宇宙空間における存在比
3×10-8%
CAS登録番号
7440-74-6
PubChem CID番号
5359967
原子特性
原子半径
167 pm
共有結合半径
142 pm
電気陰性度
1.78 (ポーリングの値)
イオン化エネルギー
5.7864 eV
モル体積
15.7 ㎝3/mol
熱伝導率
0.816 W/㎝·K
酸化数
1, 2, 3
用途
Indium's current primary application is to form transparent electrodes from indium tin oxide in liquid crystal displays and touchscreens.
It is widely used in thin-films to form lubricated layers.
It is also used for making particularly low melting point alloys, and is a component in some lead-free solders.
It is widely used in thin-films to form lubricated layers.
It is also used for making particularly low melting point alloys, and is a component in some lead-free solders.
Indium is considered to be of low toxicity
同位体
安定同位体
113In不安定同位体
97In, 98In, 99In, 100In, 101In, 102In, 103In, 104In, 105In, 106In, 107In, 108In, 109In, 110In, 111In, 112In, 114In, 115In, 116In, 117In, 118In, 119In, 120In, 121In, 122In, 123In, 124In, 125In, 126In, 127In, 128In, 129In, 130In, 131In, 132In, 133In, 134In, 135In