White radiation neutron-diffraction techniques

In a recent paper Hubbard, Quicksall & Jacobson [Acta Cryst. (1972). A28, 236-245] describe a highly efficient white-radiation neutron-diffraction technique. The present note discusses some of the problems which arise from the use of such techniques in the light of recent measurements at Harwell and emphasizes that, because of these problems, structure determination using white-beam techniques is less reliable than that possible using conventional monochromatic beam techniques.