| Abstract: | Summary 1) Preliminary data have been obtained, indicating the existence of structures of two types in silicathree-dimensional framework and double-chain. 2) A model has been proposed for the structure of silica, which resembles the structure of layer clay minerals. 3) The absorption bands in the range of the  OH and (Si–(OH) stretching vibrations have been interpreted. 4) The adsorption centers on silica for proton-donor molecules are the oxygen atoms of OH– ions and SiOH groups; the adsorption centers for electron-donor molecules are the hydrogen atoms of the accessible SiOH groups. 5) It has been shown that the solid-state lattice vibrations are changed under the influence of adsorption.All-Union Scientific-Research Institute for Petroleum Refining, Moscow. Translated from Zhurnal Strukturnoi Khimii, Vol. 18, No. 1, pp. 97–106, January-February, 1977. |
