^The thermal expansion of crystalline iodine is anisotropic: the parameters (at 20 °C) for each axis are αa = 86.5×10/K, αb = 126×10/K, αc = 12.3×10/K, and αaverage = αV/3 = 74.9×10/K.
References
These references will appear in the article, but this list appears only on this page.
^ Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements. Materials Park, Ohio: ASM International. ISBN978-1-62708-155-9.
This template adds an automatically generated short description (chemical elements). If the automatic short description is not optimal, replace it by adding {{Short description}} at the top of the article.
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ionization energy ref
Parameters with a .. comment suffix are added to the end of a data line, with a space added. Comments are reproduced without formatting additions (no brackets, no italics, ...):
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capacity=|heat capacity ref=|heat capacity comment=|heat capacity 2=|heat capacity 2 ref=|heat capacity 2 comment=|vapor pressure 1=|vapor pressure 10=|vapor pressure 100=|vapor pressure 1 k=|vapor pressure 10 k=|vapor pressure 100 k=|vapor pressure ref=|vapor pressure comment=|vapor pressure 1 2=|vapor pressure 10 2=|vapor pressure 100 2=|vapor pressure 1 k 2=|vapor pressure 10 k 2=|vapor pressure 100 k 2=|vapor pressure 2 ref=|vapor pressure 2 comment=<!-- Atomic properties -->|atomic properties comment=|electronegativity=|electronegativity ref=|electronegativity comment=|ionization energy 1=|ionization energy 1 ref=|ionization energy 1 comment=|ionization energy 2=|ionization energy 2 ref=|ionization energy 2 comment=|ionization energy 3=|ionization energy 3 ref=|ionization energy 3 comment=|number of ionization energies=|ionization energy ref=|ionization energy comment=|atomic radius=|atomic radius ref=|atomic radius comment=|atomic radius calculated=|atomic radius calculated ref=|atomic radius calculated comment=|covalent radius=|covalent radius ref=|covalent radius comment=|Van der Waals radius=|Van der Waals radius ref=|Van der Waals radius comment=<!-- Miscellanea -->|crystal structure=|crystal structure prefix=|crystal structure ref=|crystal structure comment=|lattice constant=|crystal structure 2=|crystal structure 2 prefix=|crystal structure 2 ref=|crystal structure 2 comment=|lattice constant 2=|speed of sound=|speed of sound ref=|speed of sound comment=|speed of sound rod at 20=|speed of sound rod at 20 ref=|speed of sound rod at 20 comment=|speed of sound rod at r.t.=|speed of sound rod at r.t. ref=|speed of sound rod at r.t. comment=|thermal expansion=|thermal expansion ref=|thermal expansion comment=|thermal expansion at 25=|thermal expansion at 25 ref=|thermal expansion at 25 comment=|thermal conductivity=|thermal conductivity ref=|thermal conductivity comment=|thermal conductivity 2=|thermal conductivity 2 ref=|thermal conductivity 2 comment=|thermal diffusivity=|thermal diffusivity ref=|thermal diffusivity comment=|electrical resistivity=|electrical resistivity unit prefix=|electrical resistivity ref=|electrical resistivity comment=|electrical resistivity at 0=|electrical resistivity at 0 ref=|electrical resistivity at 0 comment=|electrical resistivity at 20=|electrical resistivity at 20 ref=|electrical resistivity at 20 comment=|band gap=|band gap ref=|band gap comment=|Curie point K=|Curie point ref=|Curie point comment=|magnetic ordering=|magnetic ordering ref=|magnetic ordering comment=|tensile strength=|tensile strength ref=|tensile strength comment=|Young's modulus=|Young's modulus ref=|Young's modulus comment=|Shear modulus=|Shear modulus ref=|Shear modulus comment=|Bulk modulus=|Bulk modulus ref=|Bulk modulus comment=|Poisson ratio=|Poisson ratio ref=|Poisson ratio comment=|Mohs hardness=|Mohs hardness ref=|Mohs hardness comment=|Mohs hardness 2=|Mohs hardness 2 ref=|Mohs hardness 2 comment=|Vickers hardness=|Vickers hardness ref=|Vickers hardness comment=|Brinell hardness=|Brinell hardness ref=|Brinell hardness comment=|CAS number=|CAS number ref=|CAS number comment=<!-- History -->|naming=|predicted by=|prediction date ref=|prediction date=|discovered by=|discovery date ref=|discovery date=|first isolation by=|first isolation date ref=|first isolation date=|discovery and first isolation by=|named by=|named date ref=|named date=|history comment label=|history comment=<!-- Isotopes not here --><!-- other -->|engvar=|QID=}}
As of 7 Jan 2023, the "Main isotopes of <element>" tabular list will be read directly from the Isobox: "Infobox <element> isotopes". For example, {{Infobox uranium}} will read the table live from {{Infobox uranium isotopes}}.
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As of 1 Jan 2023, elements E119 and higher are not discovered. These are called theoretical elements. They can have article and other content pages though. Incidentally, this concerns period 8 completely. For the Infobox <element>, their redirected pages do not count (are treated as: "R page does not exist").
Possible situations regarding articles & discovery, are:
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"E127, E185": E123, E125, E127 ...Unbitrium Redirect: no article, no other content pages.
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Theoretical element: above-header shows
Theoretical element
Applied: when element is theoretical (E119 and higher).
No article "Isotopes of <element>": Header does not link
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R: Redirects are non-content pages. Treated as non-existant page.
E172 would be the end of period 8 ("noble gas") and E173 would be the beginning of period 9.
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Wikidata
