Phase equilibria of the 0.8H2O-0.2C5H12 system within the temperature range of 303–684 K at pressures up to 60 MPa

The analysis of the joint stability of phases and valence forms of mercury in the Hg – H2O system in the lg f O2 – 1/T coordinates for the temperature range from -50 to + 360°C was carried out by method of F. Schreinemakers. Analysis of equilibrium valence forms showed that for the composition of fluid phases, the non-autonomy of the oxide film as a phase on the surface of liquid mercury is key.

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Phase Equilibria in the In2O3-WO3 System

MRS Proceedings ◽

10.1557/proc-756-ee3.13 ◽

2002 ◽

Vol 756 ◽

Author(s):

Annette P. Richard ◽

Doreen D. Edwards

Keyword(s):

Phase Equilibria ◽

Binary Oxide ◽

X Ray Diffraction ◽

Subsolidus Phase ◽

X Ray ◽

Temperature Range ◽

Oxide Phases ◽

Phase Relationships

ABSTRACTThe subsolidus phase relationships in the In2O3-WO3 system at 800 – 1400°C were studied by X-ray diffraction. Two binary oxide phases – In2(WO4)3 and In6WO12 – are stable in air over the temperature range of 800 – 1200°C. Preferential volatilization of WO3 prevented the determination of phase equilibria above 1300°C.

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Phase equilibria in SO2 + H2O: the sulfur dioxide gas hydrate, two liquid phases, and the gas phase in the temperature range 273 to 400 K and at pressures up to 400 MPa

The Journal of Chemical Thermodynamics ◽

10.1016/0021-9614(79)90053-3 ◽

1979 ◽

Vol 11 (4) ◽

pp. 317-334 ◽

Cited By ~ 25

Author(s):

J.G. Van Berkum ◽

G.A.M. Diepen

Keyword(s):

Sulfur Dioxide ◽

Phase Equilibria ◽

Gas Phase ◽

Gas Hydrate ◽

Temperature Range ◽

Liquid Phases

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Phase equilibria in the MnO-Mn2O3-FeO-Fe2O3-Sb2O3-Sb2O5 System in Air at 1200℃

Global Journal of Chemical Sciences ◽

10.53996/2769-6170.gjcs.1000107 ◽

2021 ◽

Vol 1 (1) ◽

Author(s):

BG Golovkin

Keyword(s):

Phase Diagram ◽

Phase Composition ◽

Phase Equilibria ◽

Normal Pressure ◽

X Ray ◽

Densitometric Analysis ◽

Temperature Range ◽

Air Atmosphere ◽

Different Temperatures ◽

New Phase

Using the methods of X-ray phase and X-ray Densitometric analysis, the phase equilibria between oxides of manganese, iron and antimony have been investigated in an air atmosphere at temperatures up to 1250? in an air mosphere at normal pressure. The phase diagram of the system at 1200? was built MnO-Mn2O3-FeO-Fe2O-Sb2O3-Sb2O5. A new phase was found Mn12-2x,sup>2+Fe2x2+Sb3+Sb55+O26(0?x?1), with edge compositions FeMn5Sb3O13 and Mn6Sb3O3 (a=8.5003?0.0025Å; b=8.0064?0.0025Å; c=11.5779?0.0025Å; Z = 3; ?obs. = 5.7 g/cm3; ?calc = 5.6991 g/cm3). The phase exists in the temperature range 1180-1230oC and can be obtained by quenching, but always with a large admixture of Mn2Sb2O7 and spinel Mn112+Mn133+Sb93+O44.The reason for this behavior is that air molecules have different temperatures, as a result of which the phase composition of the reaction mixture cannot be strictly related to one temperature, and different phases can be stable at different temperatures.

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