Element 109, meitnerium, is a synthetic element that is not present in the environment at all. There is no dispute concerning the namemeitnerium for element 109.
The interested reader should consult the on-line version ofCreating Super Heavy Elements for a fascinating insight into research on "super-heavy" atoms.
Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of meitnerium where known.
Meitnerium wasdiscovered by Peter Armbruster, Gottfried Münzenber and their co-workers. in 1982 at Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany..Origin of name: named after Lise "Meitner", the Austrian physicist.
Isolation: only a few atoms of element 109, meitnerium, have ever been made. The first atoms were made through a nuclear reaction involving fusion of an isotope of bismuth,209Bi, with one of iron,58Fe.
209Bi +58Fe →266Mt +1n
Isolation of an observable quantity of meitnerium has never been achieved, and may well never be. This is because meitnerium decays very rapidly through the emission of α-particles.
Density of solid: 28200 (predicted) kg m-3
Molar volume: 10 (rough estimate based upon density estimate) cm3
Thermal conductivity: (no data) W m‑1 K‑1
Melting point: (no data) K
Boiling point: (no data) K
Enthalpy of fusion: 20.5 kJ mol-1
Atomic radius (empirical): (no data) pm
Molecular single bond covalent radius: 129 (coordination number 4) ppm
van der Waals radius: (no data) ppm
Pauling electronegativity: (no data) (Pauling units)
Allred Rochow electronegativity: (no data) (Pauling units)
Mulliken-Jaffe electronegativity: (no data)
First ionisation energy: 801 kJ mol‑1
Second ionisation energy: (no data) kJ mol‑1
Third ionisation energy: (no data) kJ mol‑1
Universe: (no data) ppb by weight
Crustal rocks: (no data) ppb by weight
Human: (no data) ppb by weight
