The use of highly oriented graphite as a monochromator was recently discussed by Sparks, and has been found to be highly suitable for light-element (<i>Z</i>≥15) x-ray, spectroscopy. This paper compares the diffracting power of the graphite monochromator with ethylenediamine-<i>d</i>-tantrate and LiF.
R. W. Gould, S. R. Bates, and C. J. Sparks, "Application of the Graphite Monochromator to Light Element X-Ray Spectroscopy," Appl. Spectrosc. 22, 549-551 (1968)