Über Alkalimetall-Suboxide. VII. Das metallreichste Cäsiumoxid—Cs7O

On Alkali Metal Suboxides. VII. The Caesium Oxide with the Highest Metal Content, CS₇O Preparation, crystal growth and X-ray investigations with modified Guinier technique and single crystal diffractometer between 0° and ?170°C are reported for the compound Cs₇O. A simple nitrogen evaporator is described. — The structure of Cs₇O corresponds to the formula [Cs₁₁O₃]Cs₁₀. Single crystal investigations at ?20 and ?l70°C lead to nearly identical atomic distances within the “ionic cluster” Cs₁₁O₃, whereas distances between these clusters and within the oxygen free parts of the structure vary as in metallic caesium.