Electron-microscopy study of the ferric chloride/graphite compound
β Scribed by M. Heerschap; P. Delavignette
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- English
- Weight
- 858 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0008-6223
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β¦ Synopsis
The direction of the Burgers vector of the dislocations bounding the intercalated ferric chloride layers in the interlamellar compound of graphite and ferric chloride has been determined by extinction of the contrast and is found to be perpendicular to the c-planes. From this result the conclusion is drawn that graphite preserves its a b a b . . . . stacking upon intercalation of FeCl,. Dislocation loops of intercalated FeC& pinched-off of moving boundary dislocations by pinning at crystal imperfections upon dissociation of the compound are presented. The formation of the ferric chloride/graphite residue compound is discussed. Dissociation of a ferric chloride/graphite layer into "free" graphite and an inclusion of ferric chloride upon locally heating the specimen in the electron-microscope is shown in a series of consecutive micrographs.
π SIMILAR VOLUMES
The Mossbauer spectrum of CTFeCl, has been reexamined at room temperature and is in good agreement with previous studies. The spectrum at 4.2 K of the intercaiate shows no sign of magnetic ordering which is observed below 15 K for Fe&, Reaction of graphite-ferric chloride with potassium results in t
Samples of highly oriented pyrolytic graphite reacted with oxygen under various conditions have been studied using optical microscopy and both transmission and scanning electron microscopy. In this manner the effects of oxidation on basal and edge surfaces have been separately evaluated. The orienta
Mijssbauer spectra show that at 300Β°K there is electron charge transfer to the iron in the pressure independent compositions C,FeCl, and C,,FeCl,. The amounts transferred are equal and the electric field at the iron nucleus in each compound is the same as in FeCI,. Furthermore the iron is substanti
## Recent X-ray diffraction studies provide evidence of: (1) Variation of the C-C bond length in alkali metal graphites and in graphite nitrate. The bond expands when the intercalate is an electron donor and contracts when it is an electron acceptor. (2) Progressive in-plane displacement of carbon