“…However, until very recently, in most structural studies only a qualitative measure of the ordering information using words such as ''strong,'' ''medium,'' and ''weak'' was reported. [6][7][8][9][10] Attempts to obtain quantitative ordering information have, however, been made lately by employing sophisticated electron and x-ray diffraction techniques, 5,11,12 largely based on a 40-year old principle given, e.g., by Warren. 13 These methods require either knowledge of fundamental reflections 5,11 or structural details of the ordered domains.…”