zirconium

Name zirconium
Symbol Zr
Atomic Weight 91.224
Atomic Number 40
CAS ID 7440-67-7
Group Number 4
Group Name (none)
Period Number 5
Origin of Name Arabic, zargun = "gold color."
Year Discovered 1824
Discovery Credits Discovered by M. H. Kalproth at University of Berlin, Germany; isolated in 1824 by J. J. Berzelius at Stockholm, Sweden.
Class Metallic
Color Silvery White
Standard State Solid at 77 F & 298 K
Description Hard, lustrous, silvery metal. Very corrosion resistant due to oxide layer, but will burn in air. Unaffected by acids, (except HF), and alkalis. Metal used in alloys, colored glazes, and nuclear reactors. Oxides used in foundry crucibles, bricks, ceramics, synthetic gemstones, and abrasives. Zirconium is commonly accompanied with Hafnium.

Diagnostic tests: 
There are no quick and diagnostic tests to detect zirconium. Most tests use solutions created by flux decomposition by Na2CO3. The element is detected by precipitation of a gelatinous base upon addition of  NH4OH, NaOH or KOH and than processed using Alizarin Red dye.

X-ray fluorescence spectroscopy is commonly employed to identify and analyze zirconium.

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