The forgotten 2theta = 47.7 deg. reflexion can now be taken into account by the 'Add peak(s)' button in the 'profile fitting dialog box', that allows to select one more time with the mouse new reflexion.
On the opposite, a reflexion can be removed from the reflexion list by desactivate the corresponding 'check case' in the 'profile fitting dialog box'.
Final refinement,
leads to the following refined parameters:
