[en] Equlibrium phase composition of the system K₂O-PbO-V₂O₅ in the range K₃VO₄-Pb₃(VO₄)₂-V₂O₅ at the temperatures of 400-450 deg C was studied. The relevant diagram of phase ratios was plotted. Formation of double potassium and lead orthovanadates KPbVO₄ and KPb₄(VO₄)₃ in equilibrium with K₃VO₄ and Pb₃(VO₄)₂ respectively and the absence of conjugations on the cross sections KVO₃-Pb(VO₃)₂ and K₄V₂O₇-Pb₂V₂O₇ are shown

[en] The character of phase formation in the systems in the range rich in V₂O₅ was studied

[en] Saturated vapor pressure above melts of binary salt systems of chromium trichloride with alkali metal chlorides was measured by the method of boiling points in isobaric version. It was established that strong interaction of components in vapor phase is observed in studied systems

[en] The reactions of [Rh(CO)₂Cl]₂ (Y₀) with cyclooctene and several other olefins (1-heptene, 1-hexene, ethylene, and cyclohexene) have been studied by IR and ¹³C NMR spectroscopy. The main reaction products are the binuclear complexes Rh₂L(CO)₃Cl₂ (Y₁) and [RhL(CO)Cl]₂ (Y₂), where L denotes the olefin. The extent of replacement of the carbonyl groups depends on the nature of the olefin and the conditions under which the reaction is carried out (the L:Rh ratio and the removal of CO from the reaction sphere). The liquid olefins form the following series according to their ability to replace the carbonyl groups: C₈H₁₄ > C₇H₁₄, C₆H₁₂ > C₆H₁₀. In the presence of an excess of C₈H₁₄, Y₂ disproportionates with the formation of a dicarbonyl product, which presumably corresponds to the formula Rh(C₈H₁₄)₂(CO)₂Cl (a pentacoordinate complex with a trigonal-bipyramidal structure). The ¹³C signal in the NMR spectrum of a solution of Y₂ in C₈H₁₄ is a singlet with σ(¹³C) 180.3 ppm, which is an indication of the rapid exchange of the carbonyl groups. Rapid exchange of the CO ligands is also observed in solutions of Y₀ in the olefins (with the exception of C₆H₁₀). For example, the ¹³C signal in the spectrum of a solution of Y₀ in C₈H₁₄ is a singlet with σ(¹³C) 179.8 ppm. The spectrum of Y₀ in C₆H₁₀ is a doublet with σ(¹³C) = 178.5 ppm and ¹J(CRh) = 76.3 Hz. A scheme for the interaction of Y₀ with olefins based on the conception of the trans antagonism of π-acceptor ligands has been proposed

[en] A study was made on the character of phase formation in M⁺VO₃-M²⁺(VO₃)₂ systems, where M⁺ = Li, Na, K, Rb, Cs, Ag; M²⁺ = Ca, Ba. It is shown that components form eutectic mixtures in the case of cation combinations: Li-Ca, Li-Ba, Na-Ba, Ag-Ba; interaction product is presented by the binary metavanadate of M₂⁺M²⁺(VO₃)₄ in systems with cations: Na-Ca, K-Ca, Rb-Ca, Ag-Ca, K-Ba, Rb-Ba, Cs-Ba. Cs₂V₄O₁₁ and Ca₂V₂O₇ form in result of CsVO₃ and Ca(VO₃)₂ interaction in 1:1 ratio. Dependence of the character of phase formation on the value of relative difference of cation radii is shown

[en] Phase equilibrium diagrams in Na₂O-BaO-V₂O₅ and K₂O-BaO-V₂O₅ triple systems for subsolutions range are built on the basis of thermodynamic and experimental investigations. Formation of K₂Ba(VO₂)₄ binary metavanadate is found, and occurrence of NaBaVO₄ and KBaVO₄ binary orthovanadates is confirmed. Thermal behaviour of binary vanadates is investigated

[en] Character of phase formation in MVO₃-Cd(VO₃)₂ systems under heating was investigated. It is shown that components don't interact in systems with M=Li, Na, Ag; binary methavanadate of M₂Cd(VO₃)₄ composition is the product of interaction in systems with M=K, Rb, Cs

[en] Phase formation in systems MVO₃-Zn(VO₃)₂, where M=Li; Na,K,Rb,Cs,Ag,is investigated. It is shown that at M=Li, Na formation of Zn₃V₂O₇ and compounds, existing in system MVO₃-V₂O₅ takes place, at M=K,Rb,Cs,Ag double compounds of the composition M₂Zn(VO₃)₄, coexisting with MVO₃, are formed. In the range M₂Zn(VO₃)₄-Zn(VO₃)₂ the systems are pseudobinary. In system AgVO₃-Zn(VO₃)₂ transition into pseudobinary state is realized above 515 deg C from the mixtures of Ag₂Zn(VO₃)4 and Zn(VO₃)₂ formed at low temperatures. X-ray diffraction characteristics of double metavanadates M₂Zn(VO₃)₄ are presented

[en] Phase diagram of V₂O₅-Pb₂V₂O₇ system is plotted. Lead metavanadate Pb(VO₃)₂ is shown to be melted incongruently at 490 deg C. Temperature and concentration closeness of eutectic and peritectic points of the system is disclosed

[en] The formation of double sodium and magnesium orthovanadates Na₆Mg₃(VO₄)₄ and NaMg₄(VO₄)₃ during thermal treatment of stoichiometric mixtures of Na₂CO₃ and V₂O₅ is investigated. Vanadium oxide bronze Na_xV₂O₅ (330-350 deg C) and magnesium metavanadate (500 deg C) are initial products of the solid phase process. The following formation of local eutectic liquid phases complicates and facilitates the process occuring in the direction of S-element content increase in all successive interaction products