zweidimensionales bewegtes Bild
Evaporation of Crystals - Evaporation of Germanium-mono-sulfide Cleavage Plane
With the interference-contrast-microscope it is possible to observe low steps which occur on a GeS-cleavage face during evaporation. The surface evaporates at locations where the crystal structure is disturbed: at the cleavage steps and at distinct dislocations. At first the cleavage steps are completely evaporated if they are not oxidized. Subsequently terraced pits are formed. Steps spread from the center of the pits over the surface homogeneously. The origins of the steps are locally fixed (at dislocations) or appear at random locations when the steps are formed by dislocation loops or by stacking faults. The shape of the pits is rhombic at low temperatures and oval at high temperatures. In addition, rectangular pits randomly appear at different locations at high temperatures. With increasing temperature stationary rhombic step patterns appear temporarily dendritic. Herringbones are formed by intersecting steps of different stationary centers. Precipitated impurities (GeS[2]) affect the spreading steps if the surface deviates from the ideal cleavage plane. Many details of the step patterns are explained by still pictures which show chemically etched examples. A ball model and an animation illustrate the relation between evaporation patterns and the crystal structure.
- Weitere Titel
-
Kristallverdampfung - Verdampfung der Germaniummonosulfid-Spaltfläche
- Standort
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Hannover TIB
- Umfang
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214MB, 00:17:21:21 (unknown)
- Sprache
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Englisch
- Anmerkungen
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Audiovisuelles Material
- Erschienen in
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Evaporation of Crystals - Evaporation of Germanium-mono-sulfide Cleavage Plane ; (Jan. 1983)
- Schlagwort
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single crystal / germanium disulfide
chemistry
crystal lattice decomposition
physics
geological sciences
crystals (physics)
protective gas
mineralogy
heating chamber
sources / dendritic
solid state physics
Encyclopaedia Cinematographica
germanium monosulfide / cleavage plane
argon
evaporation of crystals
dislocations / crystals
inorganic chemistry
crystal evaporation
step dislocation
cleavage plane
crystallography
precipitation / germanium disulfide
semi crytsal sites
etching pit, rhombic
evaporation pattern
lattice structure / crystal
lattice model
screw dislocation
evaporation
monocrystal / germanium disulfide
- Ereignis
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Veröffentlichung
- (wer)
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IWF (Göttingen)
- (wann)
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1983-01-01
- Beteiligte Personen und Organisationen
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Schönherr, Erich
Winckler, Erika
- DOI
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10.3203/IWF/E-2791eng
- Letzte Aktualisierung
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04.12.2024, 08:09 MEZ
Datenpartner
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Objekttyp
- zweidimensionales bewegtes Bild
Beteiligte
- Schönherr, Erich
- Winckler, Erika
- IWF (Göttingen)
Entstanden
- 1983-01-01