zirconium /zir·co·ni·um/ (zir-ko´ne-um) a chemical element, at. no. 40, symbol Zr.
zirconium (Zr)
zirconium [zir-ko´ne-um]
zirconium (Zr),
zir·co·ni·um (zûr-k  n - m)n. Symbol Zr A strong ductile metallic element obtained primarily from zircon, used in deodorants and dermatologic preparations. Atomic number 40. |
zirconium (Zr)
[zərkō′nē·əm]
Etymology: Ar, zarqun, zircon
a steel-gray, tetravalent metallic element. Its atomic number is 40, and its atomic mass is 91.22. It occurs widely in combined form, especially in zircon and baddeleyite. It is usually extracted from sands containing zircon by heating with carbon and chlorine and passing the resulting volatile zirconium tetrachloride into hot molten magnesium or into sodium to yield a spongy form of the free metal. A component of zirconium dioxide was formerly used in some ointments for the treatment of poison ivy skin rashes, but such ointments caused skin granulomas in some individuals. Similar skin conditions developed in individuals using deodorants containing zirconium sodium lactate, and the use of zirconium compounds, except for zirconyl hydroxychloride, has been discontinued in the manufacture of skin ointments. Zirconyl hydroxychloride is still used in antiperspirants.
zirconium [zir-ko´ne-um]
a chemical element, atomic number 40, atomic weight 91.22, symbol Zr. (See Appendix 6.)
zirconium (Zr),
n a metallic element with an atomic number of 40 and an atomic weight of 91.22. It is widely distributed in nature, although no concentrations are found in any one place.
zirconium
a chemical element, atomic number 40, atomic weight 91.22, symbol Zr. See Table 6.
zirconium chlorhydrate
an astringent.
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