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Zirconium (₄₀Zr^91.224)
[7440-67-7]

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Elemental Form


Zirconium is a hard, lustrous, grayish-white metal. The mineral has been known since ancient times, but the existence of elemental zirconium was not known until the late 18th century. It is abundant in S-type stars and is a component of the sun and meteorites. It is very corrosion resistant and is utilized extensively by the chemical industry where corrosive agents are used. Zirconium is routinely found with some level of hafnium, since seperation of the elements is difficult.
Melting Point	1855°C	Boiling Point	3580°C
Density	6.506g/cm³	Specific Heat @ 25°C	0.066cal/g°C
Heat of Fusion	3.74k-cal/g-atom	Heat of Vaporization	120k-cal/g-atom
Atomic Volume	14.1W/D	First Ionization Energy	160K-cal/g-mole
Electronegativity	1.4Pauling's	Covalent Radius	1.45Angstroms
Vickers Hardness	110	Linear Coefficient of Expansion	5.7x10^-6K^-1
Electrical Resistivity	41.4µΩ-cm	Crystal Structure	Hexagonal
Compressibility	11.77x10^-6cm²/kg	Thermionic Work Function	4.1eV
Modulus of Elasticity	11.2x10⁶psi	Poisson Ratio	0.34
Magnetic Susceptibility	119x10^-6emu/g-atom	Grueneisen Constant	128,900
Hall Coefficient	0.18x10¹²V-cm/A-Oe