Re: structure factors calculation

1999-03-05 Thread Patrick Weisbecker
Hi Brian, In fact my problem came from a default parameter in LAZY but not from thermal term (i had checked it was at 0),it was the correction for anomalous dispersion which was made by LAZY. Patrick Weisbecker. At 10:26 05/03/99 -0500, you wrote: >Hi Pat, > >Not everything requires a compute

Re: structure factors calculation

1999-03-05 Thread Brian H. Toby
Hi Pat, Not everything requires a computer, even though I have a reputation for liking to use them. Going back to Stout & Jenson, one finds F(hkl) = SUM f(i) EXP[2 pi i * (hx + ky + lz)] [since you are ignoring displacement (nee thermal) factors] For the FCC case, you have 4 atoms at

structure factors calculation

1999-03-05 Thread Patrick Weisbecker
Hi all, As a new rietveld user (fullprof) i wanted to check structure factors calculated thanks to several others softwares : Lazy-Pulverix, Powdercell 1.0 and Carine Crystallography 3.1. And i was surprised to obtain significants differences. For instance for Nickel FCC, lazy-pulverix and fullp