Hello, let's share our methods of constructing initial coordinates for SIESTA.
There is a lot of atomic structure apps under linux, but I didn't find anything better than use *.car format and then copy/paste its content into input.fdf with following manual edit. It is not very comfort, especially there is a lot of trial calculations. May be there is some apps that produce *.STRUCT_IN file directly? Which of them support periodic cell and symmetry operations? Mike.
