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The results of field and laboratory studies of structural and aggregate state of gray forest soils of the region are discussed. The paper ccharacterizes the organization structure of the soil profile and its changes under different biocenoses. The influence of anthropogenic factors on the parameters of the structural state of soils is shown. Key words: gray forest soils, light gray forest soils, structure, morphology, aggregate, structuring factor, the coefficient of water resistance.

Hydrogenation of orthorhombic KHg2-type R(Cu,Ni)2 pseudobinary intermetallic compounds (R = Ce, Pr, Nd) was found to lead to the formation of an orthorhombic insertion-type hydride, which readily transforms into a hexagonal Fe2P-type hydride. This “post-hydrogenation” structural transformation can be accelerated by heating in vacuum at 100-120°C and is accompanied by release of ¼ of the available hydrogen, as has been confirmed by PND studies. Further heating in vacuum leads to disproportionation of the hydride and recombination with recovery of the orthorhombic R(Cu,Ni)2 compound after complete elimination of hydrogen from the material.