I. A. Kirilenko

Glass formation in the Al2(SO4)3-Al(NO3)3-H2O system

Glass formation boundaries in the Al2(SO4)3-Al(NO3)3-H2O system were determined. IR spectra were studied. Schemes of structural rearrangements within the boundaries of a second glass formation region in the Al(NO3)3-H2O binary subsystem are suggested. A structure is suggested for glassy Al(NO3)3H2O.

Structural Aspect of Glass Formation in Aqueous Electrolyte Glass-Forming Systems

Water–electrolyte systems containing aqueous solutions of Group I–III metal, transition metal, and lanthanide nitrates, iodates, sulfates, acetates, orthophosphates, chlorides, and fluorides, inorganic acids, as well as aqueous and nonaqueous solutions of some of organic compounds (alcohols, acids, aromatic hydrocarbons) have been studied. The research methodology developed at the Institute of General and Inorganic Chemistry, RAS, and the analysis of experimental data have no analogues in our country and abroad. On the basis of the results obtained, general tendencies of glass formation in various water–electrolyte systems have been revealed. For the first time, a polymeric structure of glass-forming compositions of a number of water–electrolyte systems has been proved. The assumption is made that the nature of glass formation in water–electrolyte systems is the same as in systems containing “classical glass” (phosphates, silicates, and others) and organic glass-forming systems, that is, polymeric nature.

Glass formation in the ZnCl2-H2O system

A scheme of structural groups responsible for glass formation in the ZnCl2-H2O system was proposed. Possible glass formation mechanisms in the ZnCl2-H2O system and in glassy ZnCl2 were compared.

Glass formation in the Al(IO3)3-Al2(SO4)3-H2O system

Glass-formation boundaries in the Al(IO3)3-Al2(SO4)3-H2O system are determined. The IR spectra of glassy and crystalline Al(IO3)3 · 8H2O samples are measured. The structure and properties of glassy Al(IO3)3 · 10H2O are compared to those of glassy Al2(SO4)3 · 10H2O.

Glass Formation in the Al 2 (SO 4 ) 3 –(CH 3 ) 2 SO–H 2 O System

The glass formation in the Al2(SO4)3–(CH3)2SO–H2O system was found for the first time. The competitive ability of ligands, dimethyl sulfoxide and water (which are strong donors), for entering the first coordination sphere of aluminum is considered. The possibility of mixed coordination of (CH3)2SO (via sulfur and oxygen atoms) in the first coordination sphere of aluminum with retention of the glass-forming ability of the sample was suggested on the basis of IR spectral study.

Glass formation in the systems Al2(SO4)3-MSO4-H2O (M = Cd2+, Zn2+, Mg2+) and Al2(SO4)3-Fe2(SO4)3-H2O

The glass formation region boundaries were found in the systems Al2(SO4)3-MSO4-H2O, where M = Cd2+, Zn2+, and Mg2+, and Al2(SO4)3-Fe2(SO4)3-H2O. The causes of the differences in glass-forming ability between the studied systems were analyzed. The structures and properties of glassy Al2(SO4)3 · 11H2O and Fe2(SO4)3 · 11H2O were compared.

Glass formation in the LiCl-H2O system

The causes of the great extent of the glass formation range in the LiCl-H2O system were discussed in the frame of studying glass formation in aqueous electrolyte systems. Suggested causes of such an extent of the glass formation range are, first, the nature of the interaction of components in the system and, second, the specifics of the interaction of the lithium ion with water.

Glass formation in the Al(IO3)3-Al2(SO4)3-HIO3-H2O system

On the basis of experimental data obtained in the study of glass-formation boundaries in the Al2(SO4)3-HIO3-H2O, Al(IO3)3-Al2(SO4)3-H2O, and Al(IO3)3-HIO3-H2O systems and using geometrical analysis, we predict the positions of glass-formation boundaries in the Al(IO3)3-Al2(SO4)3-HIO3-H2O four-component system along 60, 40, and 25 wt % H2O sections.

Glass formation in the system Al(IO3)3-HIO3-H2O

Glass-formation features in the system Al(IO3)3-HIO3-H2O are discussed, and the boundaries of the glass field are determined.