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Том 63, № 13 (2018)
- Год: 2018
- Статей: 4
- URL: https://bakhtiniada.ru/0036-0236/issue/view/10316
Synthesis and Properties of Inorganic Compounds
Structural Features of Uranyl Hydroxylaminate and Oximate Complexes
Аннотация
On the basis of the currently available uranyl complexes with hydroxylamine and its N-substituted derivatives and oximes, the coordination modes of the ligands and structural features of such complexes have been considered with the aim of determining general trends for this new family of uranium(VI) compounds. All the uranyl oximate and hydroxylaminate complexes contain a deprotonated ligand coordinated to the central atom through the nitrogen and oxygen atoms to form a stable three-membered chelate ring. Depending on the composition, these compounds can be divided into two large groups: complexes with tris(chelate) and bis(chelate) structural moieties.
1689-1703
Physicochemical Aspects of Development of Multicomponent Chalcogenide Phases Having the Tl5Te3 Structure: A Review
Аннотация
The literature data on ternary structural analogues of the compound Tl5Te3 and multicomponent phases based on them are systematized. This class of inorganic substances is of considerable scientific and practical interest as promising functional materials having thermoelectric, optical, and magnetic properties, as well as topologically protected surface states and superconductivity. The focus of the survey is on phase equilibria in ternary and more complex systems where structural analogues of Tl5Te3 are formed. Crystalstructure features, thermodynamic and some physical properties of these compounds and phases of variable composition are considered.
1704-1730
Water–Electrolyte Glass-Forming Systems: A Review
Аннотация
Water–electrolyte systems comprising aqueous solutions of nitrates, iodates, sulfates, acetates, orthophosphates, chlorides, and fluorides of Group I–III metals, transition metals, and lanthanides were studied. Studies of glass formation in the system Al2(SO4)3–H2O serve as an example to give an idea of the original method for studying water–electrolyte glass-forming solutions and glasses developed at the Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, enabling one to predict their structures. This investigation method and analysis of experimental data have no analogues either in Russia or abroad. The results obtained were used to elucidate general glass formation trends in various water–electrolyte systems. We were the first to prove a polymeric structure of glass-forming compositions in some water–electrolyte systems. We were also the first to combine the glasses of water–electrolyte systems in a special class of glasses that are hydrogen-bonded polymeric items.
1731-1745
Physicochemical Analysis of Inorganic Systems
To the Properties of Fluorosilicic Acid: Evolution of Views on the State in Aqueous Solutions (Overview)
Аннотация
The views of different authors on equilibria in solutions of fluorosilicic acid are discussed. The model of the aid as an equilibrium system involving hexacoordinated complexes [SiF6–n(H2O)n]n–2 (n = 0–2) is believed to be the most adequate.
1746-1751