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Low power energy dispersive XRD-XRF portable instruments equipped withmultiple angle scanning can take advantage of the shorter acquisition time ofEDXRD with respect to ADXRD, and bring closer higher accuracy and resolution ofinter-planar distance with those obtained by ADXRD. The data produced by thisnew hybrid configuration is correlated in the sense that a single XRF or XRDspecimen appear in multiple spectra (the later shifted in energy for differingangles). Hence, for fully benefit from the richer data released by thisconfiguration, the analysis should not be confined to the independentprocessing of the spectra, specialized hybrid data processing should beconceived. We previously reported some advances in the processing of theresulting 3D data (intensity, energy and angle). Here the analyticalperformance of the first hybrid angle-energy dispersive X-ray diffraction andfluorescence portable system is assessed for non-invasive surface mineralanalysis of samples relevant for archaeometrical applications. We evaluate theperformance on standard reference material and probe applicability of themethods so developed to identify stones (jadeite and omphacite), and pigments(Prussian blue) in the pictorial layer of modeled paintings. Discussionemphasize the improvement in accuracy of interplanar distance with respect toEDXRD taken at a single fixed angles, evaluate the resolution of AD/EDXRD data,and total acquisition time.

Performance of hybrid angle-energy dispersive X-ray diffraction and  fluorescence portable system for non-invasive surface-mineral identification  in Archaeometry