Template:Infobox iodine

{{Infobox element

|engvar ={{{engvar|}}}

|symbol =I

|Z =53

|number =53

|name =iodine

|abundance=

|abundance in earth's crust=

|abundance in oceans=

|abundance in solar system=

|left=tellurium

|right=xenon

|above=Br

|below=At

|image name=Sample of iodine.jpg

|appearance=lustrous metallic gray solid, black/violet liquid, violet gas

|electrons per shell=2, 8, 18, 18, 7

|phase=

|density=4.944 g/cm³

|density conditions=(at 20° C)

|density gpcm3nrt=

|melting point prefix=(I₂)

|melting point K=386.85

|melting point C=113.7

|melting point F=236.66

|boiling point prefix=(I₂)

|boiling point K=457.4

|boiling point C=184.3

|boiling point F=363.7

|triple point K=386.65

|triple point kPa=12.1

|critical point K=819

|critical point MPa=11.7

|heat fusion= (I₂) 15.52

|heat vaporization=(I₂) 41.57

|heat capacity= (I₂) 54.44

|vapor pressure 1=260

|vapor pressure 10=282

|vapor pressure 100=309

|vapor pressure 1 k=342

|vapor pressure 10 k=381

|vapor pressure 100 k=457

|vapor pressure comment=(rhombic)

|crystal structure=base-centered orthorhombic

|crystal structure Pearson symbol=oS8

|lattice constants=a = 725.79 pm
b = 478.28 pm
c = 982.38 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=2.66

|number of ionization energies=3

|ionization energy 1=1008.4

|ionization energy 2=1845.9

|ionization energy 3=3180

|atomic radius=140

|covalent radius=139±3

|Van der Waals radius=198

|magnetic ordering=diamagnetic

|magnetic ordering ref=[http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf Magnetic susceptibility of the elements and inorganic compounds], in Handbook of Chemistry and Physics 81st edition, CRC press.

|electrical resistivity at 0=1.3×10⁷

|thermal conductivity=0.449

|thermal expansion=

|thermal expansion comment={{val|74.9|e=−6}}/K (at 20 °C){{efn|text=The thermal expansion of crystalline iodine is anisotropic: the parameters (at 20 °C) for each axis are α_a = {{val|86.5|e=−6}}/K, α_b = {{val|126|e=−6}}/K, α_c = {{val|12.3|e=−6}}/K, and α_average = α_V/3 = {{val|74.9|e=−6}}/K.}}

|Bulk modulus=7.7

|CAS number=7553-56-2

|naming=from the Ancient Greek ιώδης, "violet", for the color of its vapor

|magnetic susceptibility= {{val|−88.7|e=−6}}

|magnetic susceptibility ref= (298 K){{Cite book|title=CRC, Handbook of Chemistry and Physics|last=Weast|first=Robert|publisher=Chemical Rubber Company Publishing|year=1984|isbn=0-8493-0464-4|location=Boca Raton, Florida|pages=E110}}

|discovery and first isolation by=Bernard Courtois

|discovery date=1811

|QID=Q1103

}}

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