โ Scribed by Eberhard Stumpp; Aydin Terlan
No coin nor oath required. For personal study only.
Letters to the Editor x9 tpherulec is very similar to that observed under polarized light microscope hy Yamada and Honda[S] for the spherules obtained from pitch. However. we could not find in our as-separated \pherules such cracks as Yamada et a/. found [6].
๐ SIMILAR VOLUMES
## Solutions of lithium or sodium in hexamethylphosphoramide react with graphite to give ternary lamellar compounds, with "ideal" formulas Li(S)C,, and Na(S)C,, respectively, where (S) represents a molecule of solvent. Since the solutions of the alkali metals are relatively unstable, the reaction
The isotherm of bromine on pyrolytic graphite was studied at 20ยฐC by stepwise bromination, and several phases of graphite bromide were identified, which have compositions of C,Br, C,\*Br, C16Br and C,,,Br. X-ray studies show that these possess the socalled 2nd, 3rd, 4th and 5th stage structures resp
Intercalation compounds of natural and commercial graphites with MgCl, have been synthesized by a high temperature heterogeneous phase reaction. The stoichiometry of the compounds was found by chemical analysis, and the structure has been examined by powder X-ray diffraction. The intercalation compo