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. |