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Erschienen in:
1984 | OriginalPaper | Buchkapitel
The Temperature—Composition Phase Diagram of the GeSe—GeTe System
verfasst von : Heribert Wiedemeier, Paul A. Siemers
Erschienen in: Modern High Temperature Science
Verlag: Humana Press
Enthalten in: Professional Book Archive
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The temperature-composition phase diagram for the GeSe-GeTe system was determined between 25 and 675°C using high temperature X-ray powder diffraction techniques (1). The orthorhombic phase extends from 100 to 92 ± 3 mol% GeSe and is stable below 651 ± 5°C. For compositions between 86 ± 3 and 58 ± 3 mol% GeSe a hexagonal phase exists. Above 415 ± 5°C the hexagonal phase decomposes via a peritectoid reaction to form an orthorhombic and cubic phase. A rhombohedral phase was observed for compositions between GeTe and 52 ± 3 mol% GeSe. Above 375 ± 10°C the rhombohedral phase transforms into a cubic phase. A complete series of cubic GeSe-GeTe solid solutions exists above 651 ± 5°C.