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Abstract  

The phase diagram of the system CdI2-Bi2O3 is studied by means of X-ray diffraction, differential thermal analysis and measurements of the density of the material. As a result of the synthetic and peritectic interactions, two incongruently melting intermediate phases i.e. phase A - CdI22Bi2O3 and phase B - CdI24Bi2O3 (stable in the temperature interval 370-850C) are formed. The phase A exists in two polymorphic forms with a temperature of the phase transition T a b=320-370C. The unit cell parameters at low temperature modification of a-CdI22Bi2O3 were determined. (a=1.032 nm, b=1.046 nm, c=1.046 nm, α=115.02, β=109.11 and γ=82.04). The phases A and B have fields of homogeneity.

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Phase equilibria in the ternary system PbO−P2O5−PbCl2

IV. The partial system Pb5Cl2O4−Pb3Cl2O2−Pb10(PO4)6Cl2

Journal of Thermal Analysis and Calorimetry
Author: Halina Podsiadło

Abstract  

In the ternary system PbO−P2O5−PbCl2, the partial ternary system Pb5Cl2O4−Pb3Cl2O2−Pb10(PO4)6Cl2 was examined by thermal, microscopic, X-ray, dilatometric and IR absorption analyses and its phase diagram was provided.

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Abstract  

Phase dependencies in the ternary system Pb3Cl2O2−PbCl2−Pb10(PO4)6Cl2, which is a partial system of the ternary system PbO−P2O5−PbCl2, have been investigated by thermal, X-ray phase, microscopic, dilatometric and IR absorption analyses. The phase diagram of the Pb3Cl2O2−PbCl2−Pb10(PO4)6Cl2 system has been provided. The components have been found not to form any new chemical compounds.

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Abstract  

Phase dependences in the binary system lead fluoride [PbF2]—cadmium fluoride [CdF2] were examined and the phase diagram of this system was established. The occurrence of solid continuous solutions with a minimum melting point of 750C and a CdF2content of 35 mol% was confirmed. Thermal, dilatometric, microscopic and X-ray analytical methods were used during the investigations.

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Abstract  

Reactivity of FeVO4 towards Ni2V2O7 and Ni3V2O8 in the solid state was investigated. On the base of XRD and DTA results, phase diagrams in subsolidus area of the FeVO4-Ni2V2O7 and FeVO4-Ni3V2O8 intersections of the ternary system NiO-V2O5-Fe2O3 have been worked out and the phase diagram of this ternary system in subsolidus area in the whole component concentration range has been verified.

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Abstract  

Phase equlibria in the solid state in the system Fe2WO6−Fe8V10W16O85 were studied by means of X-ray phase powder diffraction and differential thermal analysis, This system is one of the intersections of the three-component system Fe2O3−V2O5−WO3. The investigation demonstrated that the system is not a real two-component system even below the solidus line.

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Abstract  

DTA and XRD methods were applied in studies on phase equilibria established in the system V9Mo6O40-AlVMoO7 up to 1000C over the whole component concentration range. The results were presented in the form of a phase diagram.

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Abstract  

In the ternary system Y2O3−Na2O−P2O5, the partial system Y(PO3)3−NaPO3−P2O5 was examined by means of differential thermal analysis and X-ray powder diffraction; its phase diagram is given.

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Abstract  

Differential thermal analysis (DTA) and X-ray powder diffraction (XRD) were used to study phase equilibria, established in air in the V2O5-Sb2O4 system up to 1000C. It has been found that there is a new phase =SbVO5. The =SbVO5 has been prepared by two methods: by heating equimolar mixtures of V2O5 and α-Sb2O4 in air and by oxidation of the known phase of rutile type obtained in pure argon at temperatures between 550 and 650C. Thermal decomposition of =SbVO5 in the solid state starts at 710C giving off oxygen. The results provide a basis for constructing only a part of the phase diagram of the investigated system (up to 50.00 mol% Sb2O4).

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