...Hart, Lance J. Nelson, and Rodney W. Forcade, "Generating derivative structures at a fixed concentration," Comp. Mat. Sci. 59 101-107 (March 2012) http://msg.byu.edu/papers/enum3.pdf
PDFgetN is a program to process total scattering data obtained on neutron time-of-flight powder diffractometers and to obtain the atomic pair distribution function (PDF).