Ein neues ternäres Rubidium-Eisen Oxid Darstellung von Rb6Fe2O6

A New Rubidium-Iron Ternary Oxide. Preparation of Rb₆Fe₂O₆ Dark red crystals, formed by the heating of mixtures of rubidium and iron oxides at 773 K, were identified as the new ternary oxide Rb₆Fe₂O₆ by means of chemical analysis and X-ray powder diffraction analysis. X-ray powder diffraction data and free energy of formation data are presented, the latter having been determined by equilibrium oxygen potential measurements in liquid rubidium using a Harwell electrochemical oxygen meter.