OK, a theoretical question whose answer may be straight-forward (and I will probably ridiculed for such a simple question)!! If you analyse, for example, the Pb L3 edge of 2 minerals and you then analyse the Pb L2 edge of the same 2 minerals, will the difference between the edges of 2 minerals be the same, irrespective of the edge you use? Cheers Alistair ------------------------------------------ Dr. Alistair J. McCready Mining & Minerals Saskatchewan Research Council 125-15 Innovation Blvd. Saskatoon, SK, S7N 2X8 Canada Tel: 306 933-7103 Fax: 306 933-7446 email: mccready@src.sk.ca "SRC provides Smart Science Solutions" This e-mail and any files transmitted with it are intended only for the named recipients and may contain legally privileged and/or confidential information. If you are not the intended recipient please do not disseminate, distribute or copy this e-mail without the consent of the sender.