Template:Infobox zirconium

{{Infobox element

|symbol =Zr

|Z =40

|number =40

|name =zirconium

|abundance=

|abundance in earth's crust=

|abundance in oceans=

|abundance in solar system=

|left=yttrium

|right=niobium

|above=Ti

|below=Hf

|image name=Zirconium_crystal_bar_and_1cm3_cube.jpg

|appearance=silvery white

|electrons per shell=2, 8, 18, 10, 2

|phase=

|density=6.505 g/cm³

|density conditions=(at 20° C)

|density gpcm3nrt=

|density gpcm3mp=5.8

|melting point K=2125

|melting point C=1852

|melting point F=3365

|boiling point K=4650

|boiling point C=4377

|boiling point F=7911

|heat fusion=14

|heat vaporization=591

|heat capacity=25.36

|vapor pressure 1=2639

|vapor pressure 10=2891

|vapor pressure 100=3197

|vapor pressure 1 k=3575

|vapor pressure 10 k=4053

|vapor pressure 100 k=4678

|vapor pressure comment=

|crystal structure=hexagonal close-packed

|crystal structure Pearson symbol=hP2

|lattice constants=a = 323.22 pm
c = 514.79 pm (at 20 °C){{cite book |last=Arblaster |first= John W. |title=Selected Values of the Crystallographic Properties of Elements |publisher=ASM International |publication-place=Materials Park, Ohio |date=2018 |isbn=978-1-62708-155-9}}

|electronegativity=1.33

|number of ionization energies=3

|ionization energy 1=640.1

|ionization energy 2=1270

|ionization energy 3=2218

|atomic radius=160

|covalent radius=175±7

|magnetic ordering=paramagnetic

|magnetic ordering ref={{cite book |url=https://web.archive.org/web/20110303222309/http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf|chapter=Magnetic susceptibility of the elements and inorganic compounds| editor = Lide, D. R. | title = CRC Handbook of Chemistry and Physics | edition = 86th | location = Boca Raton (FL) | publisher = CRC Press | year = 2005 | isbn = 0-8493-0486-5 }}

|electrical resistivity unit prefix=n

|electrical resistivity at 20=421

|thermal conductivity=22.6

|thermal expansion=

|thermal expansion comment={{val|5.69|e=−6}}/K (at 20 °C){{efn|text=The thermal expansion of a zirconium crystal is anisotropic: the parameters (at 20 °C) for each crystal axis are α_a = {{val|4.91|e=−6}}/K, α_c = {{val|7.26|e=−6}}/K, and α_average = α_V/3 = {{val|5.69|e=−6}}/K.}}

|thermal expansion at 25=

|speed of sound rod at 20=3800

|magnetic susceptibility=

|magnetic susceptibility ref=

|Young's modulus=88

|Bulk modulus=91.1

|Shear modulus=33

|Poisson ratio=0.34

|Mohs hardness=5.0

|Vickers hardness=820–1800

|Brinell hardness=638–1880

|CAS number=7440-67-7

|naming=after zircon, zargun زرگون meaning "gold-colored".

|discovered by=Martin Heinrich Klaproth

|discovery date=1789

|first isolation by=Jöns Jakob Berzelius

|first isolation date=1824

|QID=Q1038

}}

{{Infobox element/element navigation|symbol=Zr}}