Calibration and data collection protocols for reliable lattice parameter   values in electron pair distribution function (ePDF) studies
  We explore and describe different protocols for calibrating electron pair distribution function (ePDF) measurements for quantitative studies on nano-materials. We find the most accurate approach to determine the camera-length is to use a standard calibration sample of Au nanoparticles from National Institute of Standards and Technology. Different protocols for data collection are also explored, as are possible operational errors, to find the best approaches for accurate data collection for quantitative ePDF studies. 
A. M. Milinda Abeykoon, Hefei Hu, Lijun Wu, Yimei Zhu and Simon J. L.   Billinge
cond-mat.mtrl-sci