Template:Infobox meitnerium

{{Infobox element

|symbol =Mt

|Z =109

|number =109

|name =meitnerium

|abundance=

|abundance in earth's crust=

|abundance in oceans=

|abundance in solar system=

|left=hassium

|right=darmstadtium

|above=Ir

|below=—

|appearance=

|mass number comment=(data not decisive){{efn|name="most stable isotope"|The most stable isotope of meitnerium cannot be determined based on existing data due to uncertainty that arises from the low number of measurements. The half-life of ²⁷⁸Mt corresponding to two standard deviations is, based on existing data, {{val|4.5|7.0|2.6}} seconds{{NUBASE2020|ref}}, whereas that of ²⁷⁴Mt is {{val|0.64|1.52|0.46}} seconds{{Cite journal |title=New isotope ²⁸⁶Mc produced in the ²⁴³Am+⁴⁸Ca reaction |last1=Oganessian |first1=Yu. Ts. |last2=Utyonkov |first2=V. K. |last3=Kovrizhnykh |first3=N. D. |display-authors=et al. |date=2022 |journal=Physical Review C |volume=106 |number=64306 |page=064306 |doi=10.1103/PhysRevC.106.064306|bibcode=2022PhRvC.106f4306O |s2cid=254435744 |doi-access=free }}; these measurements have overlapping confidence intervals. It is also possible that the unconfirmed ²⁸²Mt is more stable than both of these, with its half-life being 67 seconds.}}

|magnetic ordering=paramagnetic

|magnetic ordering comment=(predicted){{cite journal|doi=10.1016/j.adt.2009.06.001|title=Hartree–Fock–Roothaan energies and expectation values for the neutral atoms He to Uuo: The B-spline expansion method|year=2009|last1=Saito|first1=Shiro L.|journal=Atomic Data and Nuclear Data Tables|volume=95|issue=6|pages=836–870|bibcode=2009ADNDT..95..836S }}

|electrons per shell=2, 8, 18, 32, 32, 15, 2

|electrons per shell comment=(predicted)

|phase=solid

|phase comment=(predicted)

|crystal structure=face-centered cubic

|crystal structure comment=(predicted){{cite journal|doi=10.1103/PhysRevB.84.113104|title=First-principles calculation of the structural stability of 6d transition metals|year=2011|last1=Östlin|first1=A.|last2=Vitos|first2=L.|journal=Physical Review B|volume=84|issue=11|page=113104|bibcode=2011PhRvB..84k3104O }}

|density gpcm3nrt=27–28

|density gpcm3nrt ref=

|density gpcm3nrt comment=(predicted){{cite journal |last1=Gyanchandani |first1=Jyoti |last2=Sikka |first2=S. K. |title=Physical properties of the 6 d -series elements from density functional theory: Close similarity to lighter transition metals |journal=Physical Review B |date=10 May 2011 |volume=83 |issue=17 |pages=172101 |doi=10.1103/PhysRevB.83.172101 |bibcode=2011PhRvB..83q2101G }}{{cite book |last1=Kratz |last2=Lieser |title=Nuclear and Radiochemistry: Fundamentals and Applications |date=2013 |page=631 |edition=3rd}}

|number of ionization energies=5

|ionization energy 1=800

|ionization energy 2=1820

|ionization energy 3=2900

|ionization energy comment=(all estimated)

|atomic radius=128

|atomic radius comment=(predicted){{Fricke1975}}

|covalent radius=129

|covalent radius comment=(estimated)[http://www.rsc.org/chemsoc/visualelements/pages/data/meitnerium_data.html Chemical Data. Meitnerium - Mt], Royal Chemical Society

|CAS number=54038-01-6

|magnetic susceptibility=

|magnetic susceptibility ref=

|naming=after Lise Meitner

|discovered by=Gesellschaft für Schwerionenforschung

|discovery date=1982

|QID=Q1258

}}

Template:Infobox meitnerium

Notes