Table 4 Semi-quantitative results of the µ-XRF analysis of sample KLR-12290/C93 encrustation. The NIST2711 standard material was used for absolute calibration using the Bruker software

From: Investigations of the relics and altar materials relating to the apostles St James and St Philip at the Basilica dei Santi XII Apostoli in Rome

Element

Conc.

wt%

Si

5.18

Ca

29.8

Fe

0.55

Cu

0.05

Zn

0.85

Sr

0.024

Ba

0.25

Pb

0.46

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