Showing papers on "Binary system published in 1973"
TL;DR: In this paper, the properties and chemical compositions of glasses suitable for crystallization of ferro-electric Pb5Ge3O11 are described, and the crystal structure of Pb3Ge2O7 had a hexagonal symmetry witha=10.16 A andc=19.37 A.
Abstract: Thermal properties and chemical compositions of glasses suitable for crystallization of ferro-electric Pb5Ge3O11 are described. The crystallization of lead germanate glass was investigated by DTA and X-ray diffraction. In the range from 62 to 62.5 of PbO in mole per cent, Pb5Ge3O11 was obtained as a single phase after a heat treatment. In the chemical composition around 5PbO·3GeO2 in the binary system of PbO-GeO2, Pb5Ge3O11 and two new phases of Pb3Ge2O7 and Pb3GeO5 were found to exist. The crystal structure of Pb3Ge2O7 had a hexagonal symmetry witha=10.16 A andc=19.37 A, and Pb3GeO5 was classified into orthorhombic system witha=4.85 A,b=15.52 A and c=11.77 A.
39 citations
TL;DR: In this article, the phase behavior of the i-butane-ethane mixture was investigated and the phase compositions and refractive indices of the coexisting phases were measured. But the only previous work reported in the literature on the phase behaviour of this binary system is that of Skripa et al. who reported 5 isotherms in the region from 0/sup 0/ to -70/sup 1 0/C.
Abstract: Ethane and i-butane are present in essentially all multicomponent mixtures of interest to the petroleum and natural gas processing industry. The only previous work reported in the literature on the phase behavior of this binary system is that of Skripa et al. who reported 5 isotherms in the region from 0/sup 0/ to -70/sup 0/C. The present work includes higher temperatures in the region from 100/sup 0/ to 250/sup 0/F. The study is a continuation of a previous program and includes experimental measurements of the phase compositions and refractive indices of the coexisting phases.
19 citations
TL;DR: It is shown that either of these limiting models can account for the experimentally observed composition-dependent gelling behavior of all three binary mixtures of hemoglobins A, S and CH.
19 citations
15 citations
TL;DR: In this article, the mutual diffusion coefficients of triethylamine + water + urea were measured over the whole composition range by Gouy interferometry at 5 and 15°C.
Abstract: Mutual diffusion coefficients have been measured over the whole composition range by Gouy interferometry at 5 and 15°C. Attempts to measure the four mutual diffusion coefficients characteristic of the ternary system triethylamine + water + urea were not successful because of experimental problems associated with these mixtures. Data on the binary system have been combined with accurate activity data, and with intradiffusion coefficients to obtain frictional coefficients. These show a very marked concentration dependence of a type which suggests that each component is surrounded preferentially by molecules of the same species, that is, that extensive clustering occurs. This is consistent with a system showing a lower consolute temperature.
6 citations
TL;DR: It is found that approximately 2.0 to 2.5 times as much hardware is required for this high-speed addition method in the negative binary system as compared to the positive binary system.
Abstract: Conditional-sum addition in a -2 base system and its comparison with normal binary conditional-sum addition is discussed. It is found that approximately 2.0 to 2.5 times as much hardware is required for this high-speed addition method in the negative binary system as compared to the positive binary system.
5 citations
3 citations
TL;DR: In this paper, a binary system of N-vinyl succinimide and endomethylene tetrahydrophtalic acid monoallyl ester with some additives was studied and it was established that the amount and nature of the quasi-eutectic structure could be regulated to the desired extent only when crystallization was performed under nearly isothermal conditions.
2 citations
TL;DR: In this paper, a ternary eutectic exists at a composition very close to that of the SnPb binary system at 38 wt.% Pb, 62% Sn.
Abstract: The SnPbSn 4 As 3 system has been investigated by thermal analysis, metallographic and X-ray procedures. A ternary eutectic exists at a composition very close to that of the SnPb binary system at 38 wt.% Pb, 62% Sn. It melts at 182.2 ± 0.5 °C. Sn 4 As 3 is the primary phase of precipitation over about 98% of the compositional fields, and a lead-rich phase solidifies first from melts covering 2% of the area. No ternary compounds are formed in the system.
2 citations
1 citations
TL;DR: In this article, the limit of the congruently melting compound formation in binary fused salt systems was shown by introducing a parameter I 1, defined by I 1 = n 1 P 1 /(n 1 p 1 + n 2 P 2 ) where P i and n i are the polarization power of cation (P 1 > P 2 ), and the mole fraction of the i -th salt respectively.
Abstract: In order to show the limit of the congruently melting compound formation in binary fused salt systems introduction of a parameter is proposed in this paper. The parameter is defined by I 1 = n 1 P 1 /( n 1 P 1 + n 2 P 2 ) where P i and n i are the polarization power of cation ( P 1 > P 2 ) and the mole fraction of the i -th salt respectively. When the congruently melting compound is formed in the binary system of alkali chlorides the values of I 1 are found to fall into the range 0.5–0.95. Further, a linear relation is found between the equivalent conductivity of the binary fused salt system and the parameter I 1 . A discontinuous change in the slope is observed at the point where the congruently melting compound is formed.
TL;DR: In this article, the authors examined the validity of the equation for the binary systems accompanied by hypothetical chemical reaction by using the reported data in literature and found that the equation can be applied for several systems.
Abstract: It has been: known that the vapo liquid equilibrium data for the system accompanied, by chemical reaction can be correlated by following equation:where Kz is the vapor-liquid equilibrium ratio (yt/xt) for component i, T is the absolute temperature and At and Bt are constants.Validity of the equation for the binary systems accompanied by hypothetical chemical reaction was examined by using the reported data in literature. Consequently, it was found that the equation can be applied for several systems. Constants At and Bt can be determined from one x-y-T datum for the binary system and boiling point data for pure substances which compose the system. Using these constants, x-y-T relation over all range for the binary system can be estimated. Above mentioned facts can be interpreted by censidering that the hypothetical reaction system is the reaction system in which the reaction is occurring very slowly.
01 Jan 1973