scholarly journals Melting upon cooling and freezing upon heating: fluid–solid phase diagram for Švejk–Hašek model of dimerizing hard spheres

Soft Matter ◽  
2017 ◽  
Vol 13 (6) ◽  
pp. 1156-1160 ◽  
Author(s):  
Yurij V. Kalyuzhnyi ◽  
Andrej Jamnik ◽  
Peter T. Cummings
2007 ◽  
Vol 99 (9) ◽  
Author(s):  
Stefano Buzzaccaro ◽  
Roberto Rusconi ◽  
Roberto Piazza

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Dunya Mahammad Babanly ◽  
Qorkhmaz Mansur Huseynov ◽  
Ziya Saxaveddin Aliev ◽  
Dilgam Babir Tagiyev ◽  
Mahammad Baba Babanly

The solid-phase diagram of the Tl-TlBr-S system was clarified and the fundamental thermodynamic properties of Tl6SBr4 compound were studied on the basis of electromotive force (EMF) measurements of concentration cells relative to a thallium electrode. The EMF results were used to calculate the relative partial thermodynamic functions of thallium in alloys and the standard integral thermodynamic functions (-ΔfG0, -ΔfH0, and S0298) of Tl6SBr4 compound. All data regarding thermodynamic properties of thallium chalcogen-halides are generalized and comparatively analyzed. Consequently, certain regularities between thermodynamic functions of thallium chalcogen-halides and their binary constituents as well as degree of ionization (DI) of chemical bonding were revealed.


Nature ◽  
1965 ◽  
Vol 206 (4979) ◽  
pp. 85-85 ◽  
Author(s):  
J. H. M. REK
Keyword(s):  

1969 ◽  
Vol 51 (10) ◽  
pp. 4583-4586 ◽  
Author(s):  
Sandra C. Greer ◽  
Lothar Meyer

2014 ◽  
Vol 7 (1) ◽  
pp. 20-24 ◽  
Author(s):  
Jana Jurišová ◽  
Vladimír Danielik ◽  
Pavel Fellner ◽  
Marek Lencsés ◽  
Milan Králik

Abstract Potassium nitrate as a fertilizer suitable for greenhouse and hydroponic applications can be prepared by the reaction of potassium sulphate with calcium nitrate. However, it may happen that simultaneously with the precipitation of gypsum (CaSO4·2H2O) also two other binary salts, viz. syngenite (K2SO4·CaSO4·H2O) and görgeyite (K2SO4·5CaSO4·H2O) can crystallize. This would lower the yield of KNO3. For minimization of potassium loss we have to determine the conditions under which syngenite and görgeyite crystallize. As a useful tool for the quantitative determination of specific hydrates, simultaneous DTA/TG technique appeared. Each hydrate decomposes at a certain temperature. The loss of water at dehydration can be used for a quantitative determination of the amount of the hydrate in the precipitating solid phase. Based on the experimental data several conclusions can be drawn: (i) excess of calcium cations lowers the concentration of sulphate ions in the liquid phase together with lowering of contents of syngenite and görgeyite in the solid phase; (ii) higher content of water results in a higher solubility of sulphate ions; (iii) joint crystallization of syngenite and gypsum occurs in the composition area interesting from the point of KNO3 production; (iv) area of the primary crystallization of görgeyite does not exist in the phase diagram at 80 °C. However, görgeyite crystallizes at the molar ratio Ca(NO3)2:K2SO4 = 1:1 by ternary crystallization; (v) area of crystallization of pure gypsum is shifted to lower ratio Ca(NO3)2:K2SO4 by the addition of water to the system.


1997 ◽  
Vol 55 (6) ◽  
pp. 7228-7241 ◽  
Author(s):  
Matthias Schmidt ◽  
Hartmut Löwen

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