Atom radii are calculated for chemical elements in different energy states based on photon energy of the emission (absorption) spectrum of atoms.

Based on the graph theory, the fourfold mutual system Na, K // Cl, NO3, MoO4 was differentiated taking into account the complex formation (NaКMoO4, K5Cl(NO3)4, Na3CI(MoO4)) and the inner secants (KNO3-Na3CIMoO4, K6CI(NO3)5-Na3CIMoO4). For the first time, the complex of the three-component system NaCl-KNO3-Na2MoO4,...

Phase equilibria in two-component systems NaBr-(Li2WO4)-V2O5 were studied for the first time by physical and chemical analysis. The corresponding state diagrams are constructed. It was found that the systems are eutectic and are characterized by congruent (2Li2WO4?3V2O5, 3V2O5?NaBr) and incongruent (Li2WO4?V2O5)...

The relevance of the problem of producing clinkerless binders is well known, since the production of cement on a clinker basis is a very difficult technological process, requiring serious financial expenses. It is also environmentally controversial, due to the fact that the burning process releases a...

This paper is devoted to the development of multicomponent binders with the usage of finely dispersed mineral additives. In the course of the research it was found that mineral components of binders, combined with chemical additives favorably affect the process of structuring of cement stone, control...

The article is devoted to the development of methods for dispersing nanoreagents based on zinc oxide and silver iodide and the study of their ice-forming properties. It is shown that nanotubes of zinc oxide and silver iodide have good ice-forming properties with a specific yield of ice-forming nuclei...

It is established that the physicochemical state of niobium pentoxide of various qualifications influences the properties of solid solutions of the binary system NaNbO3 - CuNb2O6. The article shows, that for practical purposes it is possible to use technical Nb2O5. Moreover, it shows that solid solutions...

The problem of increasing the efficiency of diesel engine fuel equipment is quite urgent due to the introduction of new environmental standards stipulating limited sulfur content in the fuel, which leads to the increase in the friction of precision pairs of fuel supply equipment and as a result causes...

Investigation of the catalytic activity and selectivity of the obtained products of various nature and composition of catalysts in the course of model catalytic reactions, cracking, isomerization, disproportionation. The study of the acid sites of these catalysts and their influence on the composition...

The research of possible types of phase diagrams in liquid crystals with discotic mesogens and "graphene molecules" was carried out within the framework of the Landau theory of phase transitions. The possible types of ordering of mesogens in such systems are considered

The paper describes results of the study on polybutylene terephthalate and polybutylene terephthalate-polyethylene having high chemical resistance. The article shows the dynamics of changes in values (Ap), (Ey), (?t) (?p), (?p) depending on the composition and exposure time under unloading which is close...

Scaling of very-large-scale integration (VLSI) circuits develops in the direction of increasing the surface of a crystal, packing density of elements on crystals, and miniaturization of components. These processes are limited by the necessity to provide high microelectronic reliability and sufficient...

The adsorption of platinum (IV) in hydrochloric acid solutions of a composite based on N,N-bis(3-triethoxysilylpropyl)thiourea and 4-vinylpyridine-2-hydroxy-ethylethacrylate copolymer is studied. The value of the static adsorption capacity of the composite for platinum(IV) is found to be 215 mg/g. To...

Data on the synthesis and sorption properties of natural calcium aluminosilicates modified by poly-1-vinyl imidazole (PVIm) and poly-4-vinyl pyridine (PVP) are presented. The fullest recovery of nickel (II) ions from low-concentration solutions is observed for PVP-modified aluminosilicates. Adsorption...

The paper proposes a new method of transferable calculation of elastic constants of the second, third and fourth orders. The method is based on the assumption that the potential energy of bulk crystals may be presented as the decomposition into irreducible energies of two, three, and four atomic clusters....