Sir C. V. Raman and P. Nilakantan have published Laue photographs of diamond 1 showing modified (111) reflections, consisting of an approximately circular diffuse spot, accompanied in certain ...

IN a recent letter, A. Taylor and D. Laidler 1 describe anomalous reflections to be found on photographs of graphite taken with cobalt Kα radiation, and suggest that these may be similar to the ...