Ptuj (Slovenia): analysis of the tibia from Poetovio
The tibia from Poetovio was analysed in the Regional Museum of Ptuj.
Also in this case the analysis was performed by X-ray fluorescence (XRF) spectroscopy in a totally non-invasive modality and without any treatment of the surfaces, in order to characterize the compositions of the metal alloy.
The analysis was performed by Giorgia Agresti and Claudia Pelosi, with the assistance of Peter Holmes, Olga Sutkowska – who is studying the instrument for her phD thesis – and Tatiana Štefanič, the curator of the Museum.
The crew from the Royal Conservatoire of Scotland filmed the work (here a report of the film-making).
The inner part of the instrument was made of bone (high counts of calcium), covered by a sheet consisting of copper based alloy with variable amounts of tin.
The outer part of the instrument was made of brass alloy. The solders are rich of tin as for example the base of the knobs.
Figure 1 – A phase of the work in a room of the Museum prepared for the analysis and for the filming.