Hello All,
I had the following request from a client:
I am looking for examples of statistics used on semi-quantitative
data, i.e. comparing XRD results of multiple samples. Do you have
any recommendations or know of any papers that clearly explain their
statistical methods? In so many
James,
This may be of interest:
Stutzman, P. (2005). Powder diffraction analysis of hydraulic cements: ASTM
Rietveld round-robin results on precision, Powder Diffraction 20(2), 97-100.
The study design and statistical evaluation is based on ASTM E 691.
Regards,
Nicola
--
Nicola Döbelin
Dr.
I don't think that the term semi-quantitative is defined sharp enough
to provide a basis for a serious statistical evaluation. In geosciences
typically semi-quantitative is attributed to data where an estimation
of errors is missing, that have been never cross-checked by an
independent
Dear James,
I'm not sure these are quite what you are after, but I'm suggesting them
anyway. There were several papers from Gordon Barr about non-parametric
methods:
SNAP-1D: a computer program for qualitative and quantitative powder
diffraction pattern analysis using the full pattern
This is the best description of quantitative phase analysis by X-rays I
have ever read ...
Very true is especially this part :
... is attributed to data where an estimationof errors is missing, that
have been never cross-checked by an
independent method, and so they are suspected to be
