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The ternary phases existing on the quasi binary section CoSi/FeSi and CoSi2/β‐FeSi2have been investigated by solid state reactions and chemical transport. The solid solution serie CoxFe1‐xSi can be described as a regular solution. The transport behaviour calculated is in good agreement with the experiments. The phases have been characterized by X‐ray powder diffraction, EDX and ICP‐OES. The temperature dependence of the resistivity has been measured from 20 K up to room temperature on single crystals.

Five phases exist in the system Co-Si: Co3Si, α- and β-Co2Si, CoSi and CoSi2. The phases α-Co2Si and CoSi could be prepared by chemical transport with iodine as transport agent in the temperature range between T1(700 °C) and T2(900 °C). In a attempted systematic clarification of the chemical transport reactions of all phases in the system, the effective transport equilibria were determined. Thermodynamic data show satisfactory agreement between calculation and experiment.

Five phases exist in the system Fe-Si: Fe3Si, Fe2Si, Fe5Si3, FeSi, α-and β-FeSi2. All phases could be prepared by chemical transport with iodine as transport agent in the temperature range between T1(700 °C) and T2(1030 °C). In a attempted systematic clarification of the chemical transport reactions of all phases in the system, the effective transport equilibria were determined. Thermodynamic calculations show satisfactory agreement between calcula­tion and experiment.

GeTe, SnTe, and PbTe have been prepared by chemical transport reactions with iodine as transport agent in the temperature range between T2(800 - 700°C) and T1(700 - 500°C). The effective transport equilibria were determineted. Total pressure measurements in the system Ge- Te-I give the coexistence equlibria for condensed phases, and also for the gasphase equilibra. GeTe4exists only as a metastable phase at lower temperatures and decom poses near 260°C in GeTe and Te.

The phase Bi2O2Te exists in the pseudobinary system Bi2O3/Bi2Te3. The thermal behaviour of Bi2O2Te was determined by DTA and X-ray analysis: The phase exists up to 620 °C and decomposes into the solid phases Bi12TeO20, Bi10Te2O19[1] and liquid BiTe. The relations of the phase coexistences in the pseudobinary system and in the ternary area Bi2O3/TeO2/Bi2Te3/Te were investigated by solid state reactions, chemical transport reactions, and by total pressure measurements.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.