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Zirconium (Zr)

Zirconium (Zr)

Although the gemstone zircon was known earlier, zirconium was identified as a new element in 1789.

It is a grayish-white lustrous metal. Finely divided zirconium metal may ignite spontaneously in air. It is found abundantly in S-type stars, the sun, meteorites, and lunar rock samples. Natural zirconium includes five isotopes and fifteen others exist.

Zirconium is exceptionally resistant to corrosion by common acids and alkalis, seawater, and other agents. When alloyed with zinc, it becomes magnetic when cooled to lower than 35 °K.

Used where corrosive agents are needed, zirconium is a component in vacuum tubes, alloying agents, surgical appliances, photoflash bulbs, explosive primers, rayon spinnerets, and lamp filaments.

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