[1] Argonne Natl Lab, Div Mat Sci, Lemont, IL USA
[2] Inst Laue Langevin, Large Scale Struct Grp, Grenoble, France
[3] Univ Delaware, Dept Chem Engn, Colburn Lab, Newark, DE USA
[4] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA
[5] Univ Illinois, Dept Phys, Chicago, IL 60680 USA