Dear Lee,
Your calculations are correct provided the allowances for microabsorption and
other effects were made properly.
Regards,
Leonid
--- On Tue, 10/14/08, Lee Gerrard <[EMAIL PROTECTED]> wrote:
> From: Lee Gerrard <[EMAIL PROTECTED]>
> Subject: Question on QPA - Amorphous/crystalline mix
Dear Lee:
This is interesting to me.
Before i take some comments, would you like to send me your data and give me a
chance to try.
i hope you have done the Rietveld refinement using GSAS. If so, can you send me
a package including: 1) recent .exp file; 2) the three .cif file for A, B and
corun
The overestimation of the corundum concentration by QPA will give you
the amorphous concentration as follows:
Amorphous= (QPA amount - actual amount) / (QPA amount *(1-actual
amount))
Then you correct all QPA concentrations with the equation actual amount
= (1-amorphous) * QPA amount (that is, if
