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An investigation is made of the deformation of molecular crystals of methane and argon under the conditions of tension and stress relaxation. The Peierls barriers are shown to be the main obstacles for dislocation movement in these crystals in a wide low-temperature range. The result obtained is in good agreement with data determined for hydrogen, deuterium, and ammonium and is discussed in terms of the peculiarities of intermolecular interactions in molecular crystals. In particular, i t is shown, that the contribution of zero point oscillation energy to the bonding energy increases with decreasing temperature at which the transition from the Peierls mechanism to higher energy mechanism occurs. RccneaoBanacb nnacTmecKaR ae+opMaum MoneKympHMx KpHcTannoB MeTaHaM aproHa n p~ pacTrrmeami H penaKcauHM Hanpfimemti. YcTaHoBneHo, TO B UIM-micnoKasHB B ~T H X KpxcTannax RBJIRIOTCH 6apbepb1 natepnca. IIonyseHHbIB p e 3 y n b~a~ cosnaAaeT c HaHHmm, H J I~ Boaopoaa, HeCiTepm M aMMHaKa ti 06cyx-HynRpHbix KpxcTannax. n o~a 3 a~0 , TO YeM 6onbrrre Bmaa a~e p r~~ HynesbIx x o n e 6 a~~f i B a~e p r a m CBHBU, TeM npti 6onee ~t i 3~o f i TeMnepaType OcyuecTBnReTcn POI COM HHTepBaJIe HH3KHX TeMnepaTyp OCHOBHHMH IIpeIIRTCTBHIIMH DJIR aBtiWeHMtI IIaeTCfi B CBR3H C OCO6eHHOCTRMH MeXMOJIeKyJIRpHOrO B3aHMOHefiCTBHR B MOJIe-iIepeXOjl OT MeXaHH3Ma naPepJICa I< 6onee BbICORO3HepreTHseCKOMy MeXaHH3MY.

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