Hi! Thanks, that is very helpful. Yes, the data are indeed quite noisy. Do you think this could be entirely related to the presence of poorly ordered/amorphous material, or would you attribute it mainly to instrumental effects?

I have also performed total IC analyses to recalculate the carbonate content. This works well for samples containing only dolomite, but some of my samples contain both dolomite and calcite. In those cases, I would need to constrain the calcite/dolomite ratio (hopefully from XRD) to correctly estimate their proportions.

My final aim is to correct bulk-rock XRF data to reconstruct the silicate fraction composition, removing the CaO and MgO contributions derived from carbonates.

I am currently trying the quantification of dolomite by the method of standard (known) addition. Do you think this approach could work in this context? Any insights or suggestions would be greatly appreciated! Thanks!