Synthesis and properties of alkali-metal tetraoxo-osmate(VII) compounds
Abstract
The black compounds M[OsO4](M = Na, K, Rb, or Cs) have been prepared from OsO4 and MI in acetone. They are stable in dry air, but disproportionate immediately in aqueous acid solution to OsVIII and OsIV, and in basic solution to OsVIII and OsVI The i.r. and electronic spectra are reported and discussed. X-Ray powder diffraction studies show that M[OsO4](M = Na or K) have the scheelite structure.