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1.
M. A. Demina E. M. Bekhtereva I. K. Garkushin 《Russian Journal of Inorganic Chemistry》2013,58(9):1138-1141
The stable tetrahedron LiF-KCl-KBr-K2MoO4 of the quinary reciprocal system Li,K‖F,Cl,Br,MoO4 was studied by differential thermal analysis, and phase equilibria were determined. 相似文献
2.
M. A. Demina I. K. Garkushin E. M. Bekhtereva 《Russian Journal of Inorganic Chemistry》2014,59(11):1333-1339
Phase equilibria in the quaternary systems Li‖F,Cl,Br,CrO4 and Li‖F,Cl,Br,WO4 were studied by differential thermal analysis. In these systems, the stability of continuous series of solid solutions based on lithium chloride and bromide is preserved. The number and compositions of crystallizing phases in the systems Li‖F,Cl,Br,CrO4 and Li‖F,Cl,Br,WO4 were confirmed by X-ray powder diffraction analysis. 相似文献
3.
E. I. Malysheva I. K. Garkushin T. V. Gubanova E. I. Frolov 《Russian Journal of Inorganic Chemistry》2011,56(11):1824-1828
Phase equilibria in the Li,K‖Cl,MoO4 ternary mutual system were studied by differential thermal analysis (DTA). The characteristics of the following three ternary
eutectics were determined: E
1: 348°C, 41 mol % KCl, 7.75 mol % Li2MoO4, and 51.25 mol % LiCl; E
2: 475°C, 44 mol % KCl, 17.25 mol % Li2MoO4, and 38.75 mol % LiCl; and E
2: 477°C, 35 mol % KCl, 47 mol % Li2MoO4, and 18 mol % LiCl. 相似文献
4.
I. K. Garkushin M. A. Radzikhovskaya E. G. Danilushkina 《Russian Journal of Inorganic Chemistry》2014,59(8):866-871
The united stable tetrahedron LiF-KBr-K2MoO4-KF of the quaternary reciprocal system Li,K‖F,Br,MoO4 was studied by differential thermal analysis. The melting points and ternary eutectic and peritectic compositions in the secant triangle LiF-KBr-K3FMoO4 were identified. The melting points of the samples corresponding to the quaternary invariant equilibrium points (eutectic and peritectic points) and their compositions in the stable tetrahedron LiF-KBr-K3FMoO4-KF were determined. The volumes of crystallizing phases in the united stable tetrahedron were determined; the phase equilibria at invariant points were described. 相似文献
5.
N. N. Verdiev P. A. Arbukhanova E. G. Iskenderov 《Russian Journal of Inorganic Chemistry》2012,57(6):893-896
The Na,K‖Br,MoO4 system was studied by differential thermal analysis and X-ray powder diffraction. It was established that the liquidus surface consists of the crystallization fields of the initial components and the incongruently melting compound NaKMoO4. The coordinates of three nonvariant points were determined, which represent one eutectic, E Δ, and two peritectics, P 1 Δ , and P 2 Δ , with the melting points 472, 512, and 538°C, respectively, and the specific enthalpies of melting Δmelt H = 177, 230, and 184 kJ/kg, respectively. 相似文献
6.
A. V. Mal’tseva T. V. Gubanova I. K. Garkushin 《Russian Journal of Inorganic Chemistry》2013,58(2):219-223
Phase equilibria in Li,K∥F,NO3 and Li,K∥Cl,NO3 three-component reciprocal systems were studied by differential scanning calorimetry (DSC). Eutectic compositions (mol %) in the Li,K∥F,NO3 system were determined to be as follows: 5.0 LiF, 10.0 KF, and 85.0 KNO3 with T m = 281°C and 48.5 KNO3, 44.0 LiNO3, and 7.5 LiF with T m = 105°C. Eutectic compositions (mol %) in the Li,K∥Cl,NO3 system were determined to be as follows: 10.0 LiCl, 32.1 KCl, and 57.9 LiNO3 with T m = 147°C and 44.5 KNO3, 45.0 LiNO3, and 10.5 KCl with T m = 97°C. 相似文献
7.
M. A. Istomova G. E. Egortsev I. K. Garkushin 《Russian Journal of Inorganic Chemistry》2012,57(10):1379-1386
The partition of the Li,K,Ba??F,Br quaternary reciprocal system into simplexes was performed and confirmed by X-ray powder diffraction. Internal partitioning elements, LiF-2KBr · BaBr2 and KBr-LiF · BaF2, were identified; the tree of phases forms two cycles. Simplexes involving phase separation were determined. The stable partitioning triangles LiF-KBr-BaBr2 and LiF-KBr-BaF2 · BaBr2 were experimentally studied by differential thermal and X-ray powder diffraction analyses. The T-x diagrams of explored sections and the liquidi of the systems were constructed. Phase separation regions within the systems under investigations were delimited. The characteristics of alloys corresponding to invariant compositions were determined. 相似文献
8.
E. V. Zolotukhina T. V. Gubanova I. K. Garkushin 《Russian Journal of Inorganic Chemistry》2013,58(7):858-860
Phase equilibria in the Li, K‖Br, VO3 ternary mutual system were studied by differential thermal analysis. The composition square of the ternary mutual system is divided into two phase triangles, LiVO3-KBr-KVO3 and LiBr-LiVO3-KBr. The ternary eutectics E 1 at 331°C and E 2 at 330°C have the compositions 40.0 mol % LiVO3, 6.0 mol % KBr, 54.0 mol % KVO3 and 58.0 mol % LiBr, 3.2 mol % LiVO3, 38.8 mol % KBr, respectively. The fields of phases crystallizing in the system were delimited. 相似文献
9.
A. V. Burchakov E. M. Bekhtereva I. M. Kondratyuk 《Russian Journal of Inorganic Chemistry》2013,58(11):1356-1360
The ternary reciprocal system of fluorides and chromates of lithium and rubidium was studied for the first time. The stable pair of salts LiF and Rb2CrO4 and also binary compounds on the bordering sides partition the system into five simplexes. Studying a number of polythermal sections allowed us to determine the melting points and compositions of two peritectics and three eutectics. The crystallization fields of phases in the system were demarcated, and phase equilibria were described. 相似文献
10.
Interaction of salts in ionic melts of the ternary reciprocal systems Na,K‖BO2,MoO4 and Na,K‖BO2,WO4
The phase diagrams of the ternary reciprocal systems Na,K‖BO2,MoO4 and Na,K‖BO2,WO4 were studied for the first time by a calculation-experimental method and differential thermal analysis. The coordinates were determined for binary eutectics of the diagonal stable sections NaBO2-K2MoO4(K2WO4) and the ternary invariant points e(55 mol % NaBO2, 45 mol % K2MoO4, 740°C), e(55 mol % NaBO2, 45 mol % K2WO4, 730°C), E(4.5 mol % NaBO2, 78 mol % Na2MoO4, 17.5 mol % K2MoO4, 652°C), E(4.5 mol % NaBO2, 78 mol % Na2WO4, 17.5 mol % K2WO4, 643°C), P2(5 mol % NaBO2, 56 mol % Na2MoO4, 39 mol % K2MoO4, 673°C), P2(5 mol % NaBO2, 56 mol % Na2WO4, 39 mol % K2WO4, 671°C). Binary solid solutions based on sodium and potassium metaborates were shown to be stable. Analytical models of phase equilibrium states of the ternary reciprocal systems Na,K‖BO2,MoO4(WO4) were obtained, which enable one to calculate melting (crystallization) points and construct isotherms at any given composition. The specific heats of melting of samples of invariant compositions were found by quantitative differential thermal analysis. 相似文献
11.
M. V. Chugunova I. K. Garkushin G. E. Egortsev 《Russian Journal of Inorganic Chemistry》2011,56(4):633-638
A quaternary reciprocal system of fluorides, chlorides, and bromides of lithium and potassium was partitioned into simplexes
by a geometric method and by a graph method. Phase transformations and chemical reactions in the boundary ternary reciprocal
systems were described. A conversion line was experimentally studied, and information on crystallizing phases within the composition
prism of the Li,K‖F,Cl,Br system was obtained and confirmed by X-ray powder diffraction data. An immiscibility region in the
LiF-KCl-KBr stable triangle was outlined. 相似文献
12.
The quaternary reciprocal system Li,K‖F,Br,NO3 was described and studied for the first time. The system was partitioned into simplexes by writing an adjacency matrix and solving a logical expression. The partition was confirmed by the results of differential scanning calorimetry of two partitioning triangles (LiF-KBr-KNO3 and LiF-KBr-LiNO3) and three stable triangles (LiBr-LiF-KBr-LiNO3, LiNO3-LiF-KNO3-KBr, and KF-LiF-KNO3-KBr). The compositions (mol %) and melting points of quaternary eutectics of the system Li,K‖F,Br,NO3 were determined: E 1 □ (4.0% LiF, 48.0% LiNO3, 17.28% KBr, 30.7% LiBr, T melt = 186°C), E 2 □ (7.35% LiF, 47.53% KNO3, 2.0% KBr, 43.12% LiNO3, T melt = 102°C), and E 3 □ (2.0% LiF, 84.28% KNO3, 0.98% KBr, 12.74% KF, T melt = 280°C). 相似文献
13.
Na,Rb‖F,Br three-component reciprocal system and analysis of the Na,M‖F,Br (M = K,Rb, and Cs) series
Solid-phase reactions were studied by differential thermal analysis and X-ray powder diffraction in a sample whose composition corresponds to the complete conversion point K of the Na,Rb‖F,Br three-component reciprocal system. A stable diagonal and a metastable diagonal were studied, and the parameters of two ternary eutectics were determined. 相似文献
14.
According to the calculation results of the intrapair and interpair correlation energy for the title systems, it has been found that the intrapair correlation energy of K shell of Cl is almost a constant and both the intrashell and intershell correlation energy of K and L shell changes little. It has also been found that in MCl series compounds the value of Cl correlation energy contribution depends on the ionicity of MCl compounds, i.e., the Cl correlation energy contribution increases with the increase of the ionic bond strength of the compound and this value is always less than the correlation energy of Cl- anion but always larger than that of Cl atom. These rules are helpful for the estimation of the correlation energy of ionic compounds and the energy changes of chemical reactions. 相似文献
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17.
P. A. Akhmedova A. M. Gasanaliev B. Yu. Gamataeva 《Russian Journal of Inorganic Chemistry》2013,58(7):866-871
The Na,K,Ca,Ba‖F,WO4 quinary mutual system was differentiated based on graph theory with consideration of identified internal secant elements using a program complex. For the first time, by a combination of physicochemical analysis methods (differential thermal, visual polythermal, X-ray diffraction and projection-thermal-analytical), the NaF-K2WO4-CaF2-BaF2 quaternary system was studied, which is a stable secant complex of the quinary mutual system. The coordinates of invariant points were determined. 相似文献
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19.
用从头算方法,在HF/STO-3G、HF/3-21G和HF/6-31G水平上研究了小硅化物SiX^m4的成键倾向性。计算结果表明,所研究的分子势能曲线均有稳定的极小值(SiLi4除外)。与已知的稳定分子SiH1、SiF4和SiCl4比较,含惰性元素的未知分子SiHe^4+4、SiNe^4+4和SiAr^4+4比含碱金属和碱土金属的未知分子SiLI4、SiNa4、SiBe^4+4和SiMg^4+4有 相似文献
20.
XUE Li-Ping LIN Zhang HUANG Feng LIANG Jing-Kui 《结构化学》2007,26(10):1208-1210
Single crystal of Li2Zn2(MoO4)3 has been grown from a flux of Li2MoO4 by the top-seeded solution-growth method,and its structure was refined by the Rietveld method. It belongs to the orthorhombic system,space group Pnma with a=5.1114,b=10.4906 and c=17.6172. Good agreement between the experimental and calculated profile(Rp=6.69%,Rwp=9.73% and Rexp= 6.58%) was reached. 相似文献