DDM update at New Address

Dear colleagues: An update of DDM program is available at new address: http://icct.krasn.ru/eng/content/persons/Sol_LA/ddm.html which is hoped to be permanent. The changes made in this version are: 1. The 4-th rank tensor for anisotropic strain broadening is added. 2. The use of anisotropic

Re: Size Strain in GSAS

Indeed you missed something. I presume you have the paper. Then, take a look to the formula (15a). This is the size profile for lognormal. There is the function PHI - bar of argument 2*pi*s*R. Replace this function PHI - bar from (15a) by the _expression (21a) with the argument x=2*pi*s*R.