  We show that studying of low-frequency internal friction (LFIF) of solid
samples at low temperatures allows determining the presence of various gases
absorbed, for some reasons, in pores and caverns of the solids. The gases come
over to a solid state (cryocrystals) and exist in the pores under corresponding
thermodynamic conditions giving an additional contribution to the LFIF spectra.
The spectra reflect the special points of the gases (temperatures of melting or
phase transitions). This information gives a real opportunity for
identification of gas in the matrix, i.e. the studied solids. This may be of
great importance for investigations of cosmic or geological samples, for
instance, asteroids, meteorites, rock formations, etc. The LFIF method allows
identification of gas media surrounding the studied sample.
