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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Hafnium
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1992-09-02
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A silvery metallic element, symbol Hf, atomic
number 72, atomic weight 178.49. It occurs in
nature in zirconium ores, whose properties it
resembles. Hafnium absorbs neutrons better
than most metals, so it is used for control
rods in nuclear reactors; it is also used for
light bulb filaments. It was named in 1923 by
Dutch physicist D Coster (1889-1950) and
Hungarian chemist GC de Hevesy (1889-1966)
after Hafnia, Latin name for Copenhagen,
where the element was discovered.