Of the heavy element muscovite, only about 100 atoms have been produced artificially. Muscovite was first created at the Central Institute for Nuclear Research (JINR) in Dubná, Russia. A team of Russian scientists, led by Yuri Oganessian, created this element by colliding atoms of americium with parts of atoms of calcium. It is named after the capital city of Russia, Moscow. This element is extremely radioactive, and its atoms break apart in a fraction of a second. Scientists think muscovite would be a dense metallic solid, but with such small samples, they can only measure how big the atoms are before they break apart.

Summary of properties (Mc)

Atomic weight[289]
Discoverer (year)desconocido (2004)
Natural form- (-)
Electron configuration[Rn] 5f 14 6d10 7s2 7p3
Melting point (ºC)
Boiling point (ºC)
Abundance in earth's crust (ppm)synthetic
Isotope (abundance)
Density g/cm3
Van der Waals radius (pm)
Covalent radius (pm)162
Electronegativity (Pauling)
Vaporization enthalpy (kJ/mol)-
Enthalpy of fusion (kJ/mol)-
Specific heat capacity (J/g·K) at 25ºC and 1 atm-
Thermal conductivity (W/cm·K) at 25ºC and 1 atm-
Oxidation state
Electron affinity (eV)
1st Ionization potential (eV)

Back to the Periodic Table of the Elements.