Hafnium

From Conservapedia

Hafnium
Name	Hafnium
Symbol	Hf
Atomic number	72
Atomic mass	178.49 amu
Normal state	Solid
Classification	Transition Metals
Crystal structure	Hexagonal
Color	Silver
Date of discovery	1923
Name of discoverer	Dirk Coster & Georg von Hevesy
Name origin	From the Latin name for Copenhagen, Hafnia.
Uses	Due to its ability to absorb neutrons, used in reactor control rods and also as a gas scavenger in vacuum tubes.
Obtained from	Obtained as a by-product of zirconium refining.

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