ニオブ
41
Nb
族
5
周期
5
ブロック
d
陽子
電子
中性子
41
41
52
一般特性
原子番号
41
原子量
92.90638
質量数
93
カテゴリ
遷移元素
色
灰色
放射性
いいえ
Named after Niobe, the daughter of Tantalu
結晶構造
体心立方格子
歴史
Niobium was discovered by the English chemist Charles Hatchett in 1801 and named the new element columbium.
In 1846, German chemist Henrich Rose independently discovered the element and named it niobium.
The metal was first isolated by Swedish scientist Christian Wilhelm Blomstrand in 1864 who reduced the chloride by heating it in a hydrogen atmosphere.
In 1846, German chemist Henrich Rose independently discovered the element and named it niobium.
The metal was first isolated by Swedish scientist Christian Wilhelm Blomstrand in 1864 who reduced the chloride by heating it in a hydrogen atmosphere.
電子殻
2, 8, 18, 12, 1
電子配置
[Kr] 4d4 5s1
Brazil is the leading producer of niobium
物理特性
相
固体
密度
8.57 g/㎝3
融点
2750.15 K | 2477 °C | 4490.6 °F
沸点
5017.15 K | 4744 °C | 8571.2 °F
融解熱
26.8 kJ/mol
蒸発熱
690 kJ/mol
熱容量
0.265 J/g·K
地殻中における存在比
0.0017%
宇宙空間における存在比
2×10-7%
CAS登録番号
7440-03-1
PubChem CID番号
23936
原子特性
原子半径
146 pm
共有結合半径
164 pm
電気陰性度
1.6 (ポーリングの値)
イオン化エネルギー
6.7589 eV
モル体積
10.87 ㎝3/mol
熱伝導率
0.537 W/㎝·K
酸化数
-1, 2, 3, 4, 5
用途
Niobium is used in arc-welding rods for stabilized grades of stainless steel.
Niobium alloys are strong and are often used in pipeline construction.
The metal is used in superalloys for jet engines and heat resistant equipment.
Niobium is found in many medical devices such as pacemakers.
Niobium alloys are strong and are often used in pipeline construction.
The metal is used in superalloys for jet engines and heat resistant equipment.
Niobium is found in many medical devices such as pacemakers.
Some niobium compounds are highly toxic
同位体
安定同位体
93Nb不安定同位体
81Nb, 82Nb, 83Nb, 84Nb, 85Nb, 86Nb, 87Nb, 88Nb, 89Nb, 90Nb, 91Nb, 92Nb, 94Nb, 95Nb, 96Nb, 97Nb, 98Nb, 99Nb, 100Nb, 101Nb, 102Nb, 103Nb, 104Nb, 105Nb, 106Nb, 107Nb, 108Nb, 109Nb, 110Nb, 111Nb, 112Nb, 113Nb