Abstract
C K-emission spectra were measured by an electron probe microanalyzer in which a lead stearate pseudocrystal was used as an analyzing element for the 2nd order spectrum of the C K band. Strong polarized emission spectra were obtained from single crystal surfaces of graphite when excited by electron beams perpendicular and parallel to the basal plane. A single crystal of diamond did not give any polarized spectra, which indicated no strong orientation of electronic orbitals in diamond. It was found that the spectrum of carbon black could be synthesized graphically by averaging the spectra of single crystals of graphite at perpendicular and parallel orientations. Thus, carbons with a graphitic arrangement however slight can be expected to give only one type of spectrum. The spectrum of carbon precursor was quite different from those of any other allotropes of carbon.
