H2S in neat (no solvent) Irradiation (UV/VIS); (Ar); H2S was passed over heated Si at about 1500 K, formed SiS and a mixt. of COS and Ar (200:1) was cocondensed about 30 min on a helium-cooled Cu surface and photolysed with a medium pressure Hg lamp (H2O filter); not isolated, detected IR spect.;

in solid matrix byproducts: CO; other Radiation; 20-25 K, CH4 matrix, photolysis (10 min, Hg lamp); not isolated, followed by Raman spectroscopy;

in solid matrix Ar matrix; IR-monitoring;