Niobio
41
Nb
Grupo
5
Perio
5
Bloko
d
Protonoj
Elektronoj
Neŭtronoj
41
41
52
Ĝeneralaj Propraĵoj
Atoma Nombro
41
Atommaso
92,90638
Amasa Nombro
93
Kategorio
Transirmetaloj
Koloro
Griza
Radioaktiva
Ne
Named after Niobe, the daughter of Tantalu
Kristala Strukturo
Korpo Centrita Kubo
Historio
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.
Elektronoj per ŝelo
2, 8, 18, 12, 1
Elektrona Agordo
[Kr] 4d4 5s1
Brazil is the leading producer of niobium
Fizikaj Propraĵoj
Fazo
Solido
Denso
8,57 g/cm3
Fandpunkto
2750,15 K | 2477 °C | 4490,6 °F
Bolpunkto
5017,15 K | 4744 °C | 8571,2 °F
Varmo de Fuzio
26,8 kJ/mol
Varmo de Vaporiĝo
690 kJ/mol
Specifa Varmo Kapacito
0,265 J/g·K
Krusta Abundo
0,0017%
Universa Abundo
2×10-7%
CAS Nombro
7440-03-1
PubChem Kunmetita Identiga Nombro
23936
Atomaj Propraĵoj
Atoma Radiuso
146 pm
Kovalenta Radiuso
164 pm
Elektronegativeco
1,6 (Pauling-skalo)
Potencialo de jonigo
6,7589 eV
Atoma Volumo
10,87 cm3/mol
Termika Kondukto
0,537 W/cm·K
Oksidaj Ŝtatoj
-1, 2, 3, 4, 5
Aplikoj
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
Izotopoj
Stabilaj Izotopoj
93NbMalstabilaj Isotopoj
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