Abstract: | Glass Formation and Properties of Chalcogenide Systems. XIII. On the Compounds Na6Ge2S6 · 4 CH3OH and Na6Ge2Se6 · 4 CH3OH The glasses Ge2S3 and Ge2Se3 are soluble in solutions of Na2S or Na2Se in CH3OH forming Na6Ge2S6 · 4 CH3OH and Na6Ge2Se6 · 4 CH3OH. On heating the CH3OH-free substances are formed. From the i.r. and Raman spectra can de seen that the structure of the ions Ge2S, Ge2Se, P2S64?, and of Si2Cl6 is of the same type. The formation of the compounds can be regarded as a chemical proof for the existence of [Ge2S6] and [Ge2Se6] units as structural groups in the glasses Ge2S3 and Ge2Se3. |