Rietveld refinement guidelines

J. Appl. Cryst. (1999). 32, 36-50L. B. McCusker,a* R. B. Von Dreele,b D. E. Cox,c D. LoueÈrd and P. Scardiea.Laboratorium fuÈ r Kristallographie, ETH, ZuÈ rich, Switzerland, b.LANSCE, Los Alamos National Laboratory, LosAlamos, NM, USA, c.Physics Department, Brookhaven National Laboratory, Brookhav..