  Low power energy dispersive XRD-XRF portable instruments equipped with
multiple angle scanning can take advantage of the shorter acquisition time of
EDXRD with respect to ADXRD, and bring closer higher accuracy and resolution of
inter-planar distance with those obtained by ADXRD. The data produced by this
new hybrid configuration is correlated in the sense that a single XRF or XRD
specimen appear in multiple spectra (the later shifted in energy for differing
angles). Hence, for fully benefit from the richer data released by this
configuration, the analysis should not be confined to the independent
processing of the spectra, specialized hybrid data processing should be
conceived. We previously reported some advances in the processing of the
resulting 3D data (intensity, energy and angle). Here the analytical
performance of the first hybrid angle-energy dispersive X-ray diffraction and
fluorescence portable system is assessed for non-invasive surface mineral
analysis of samples relevant for archaeometrical applications. We evaluate the
performance on standard reference material and probe applicability of the
methods so developed to identify stones (jadeite and omphacite), and pigments
(Prussian blue) in the pictorial layer of modeled paintings. Discussion
emphasize the improvement in accuracy of interplanar distance with respect to
EDXRD taken at a single fixed angles, evaluate the resolution of AD/EDXRD data,
and total acquisition time.
