Niobium
Symbol
Nb
Atomic Number
41
Atomic Weight
92.90638
Element Classification
Discovered By
Charles Hatchet
Discovery Date
1801 (England)
Name Origin
Niobe; daughter of the mythical Greek king Tantalus.
Density(g/cc)
8.57
Melting Point
2741
Boiling Point(K)
5015
Appearance
Shiny white, soft, ductile metal
Atomic Radius(pm)
146
Atomic Volume(cc/mol)
10.8
Covalent Radius(pm)
134
Ionic Radius
69 (+5e)
Specific Heat
0.268
Fusion Heat
26.8
Evaporation Heat(kj/mol)
680
Thermal Conductivity(@25°C W/m K)
53.7
Debye Temperature
275.00
Pauling Negativity Number
1.6
First Ionizing Energy(kj/mol)
663.6
Oxidation States
5, 3
Electronic Configuration
[Kr] 4d4 5s1
Lattice Structure
Body-Centered Cubic(BCC)
Lattice Constant
3.300
Lattice C/A Ratio
n/a
