Dear All,
When using GSAS to refine and analyze multiphase (2 phases in my case)
powder data, is that "crystal phase fraction" the relative molar fraction
of one phase? If so, do I need to put constraints to make sure the sum is
one? If not so, how do I calculate the phase molar ratio from the
parameters used by GSAS (I have a rough idea that some scale factors have
to be weighted by mass absorption and other things to get phase molar
ratio) ?
I am relatively familiar with GSAS refinement of single phase data, but
have never done multiple phase analysis and would like to listen to some
one with experience before rushing to "expedt". Any general comments,
advice and hints would also be greatly appreciated. Thank you very much
and in advance.
Tao
10/27/98
