Zirconium
Symbol
Zr
Atomic Number
40
Atomic Weight
91.224
Element Classification
Discovered By
Martin Klaproth
Discovery Date
1789 (Germany)
Name Origin
The mineral, zircon.
Density(g/cc)
6.506
Melting Point
2125
Boiling Point(K)
4650
Appearance
Gray-white, lustrous, corrosion-resistant metal
Atomic Radius(pm)
160
Atomic Volume(cc/mol)
14.1
Covalent Radius(pm)
145
Ionic Radius
79 (+4e)
Specific Heat
0.281
Fusion Heat
19.2
Evaporation Heat(kj/mol)
567
Thermal Conductivity(@25°C W/m K)
22.7
Debye Temperature
250.00
Pauling Negativity Number
1.33
First Ionizing Energy(kj/mol)
659.7
Oxidation States
4
Electronic Configuration
[Kr] 4d2 5s2
Lattice Structure
Hexagonal(HEX)
Lattice Constant
3.230
Lattice C/A Ratio
1.593
