Interested in absolute quant?
Do you use internal standards?
Do I have the macros for you!
http://topas.dur.ac.uk/topaswiki/doku.php?id=weight_percentage_in_original
The macros calculate the weight percentages of the various phases, as present in the original sample, removing the contribution of the standard. Furthermore, the macros also allow for the addition of a standard that itself has a (known) amorphous fraction; the calculation of the amorphous fraction in the original sample takes this additional amorphous fraction into account.