> heavy-ish elements than it is with lighter ones. In fact, elements > heavier than iron are only generated (we think) by supernovas. Iron is star-ash. All above iron ends up as iron if played with thermonuclearly long enough. Russell --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .