## 4 Results and Discussion
### Wdxrf
\begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**Component**} & \multicolumn{3}{c}{**Result (Mass\%)**} \\ \cline{2-4}  & **P1** & **P2** & **Natural Clay** \\ \hline
**Na\({}_{2}\)O** & 0.878 \(\pm\) 0.3327 & 0.7969 \(\pm\) 0.2962 & 1.46 \(\pm\) 0.1230 \\ \hline
**MgO** & 2.1174 \(\pm\) 0.1328 & 2.5845 \(\pm\) 0.1600 & 2.47 \(\pm\) 0.1230 \\ \hline
**Al\({}_{2}\)O\({}_{3}\)** & 20.5976 \(\pm\) 0.0850 & 19.9875 \(\pm\) 0.0897 & 15.55 \(\pm\) 0.0866 \\ \hline
**SiO\({}_{2}\)** & 62.089 \(\pm\) 0.1365 & 62.0873 \(\pm\) 0.1416 & 67.9 \(\pm\) 0.1100 \\ \hline
**P\({}_{2}\)O\({}_{5}\)** & 0.5403 \(\pm\) 0.0283 & 1.2854 \(\pm\) 0.0307 & - \\ \hline
**SO\({}_{3}\)** & 0.0530 \(\pm\) 0.0155 & 0.0436 \(\pm\) 0.0234 & 0.05 \(\pm\) 0.0110 \\ \hline
**K\({}_{2}\)O** & 2.521 \(\pm\) 0.0263 & 2.0600 \(\pm\) 0.0335 & 2.54 \(\pm\) 0.0220 \\ \hline
**CaO** & 1.2391 \(\pm\) 0.0220 & 1.6613 \(\pm\) 0.0336 & 3.58 \(\pm\) 0.0345 \\ \hline
**TiO\({}_{2}\)** & 0.8534 \(\pm\) 0.0448 & 0.6962 \(\pm\) 0.0712 & 1.57 \(\pm\) 0.0105 \\ \hline
**Cr\({}_{2}\)O\({}_{3}\)** & 0.0423 \(\pm\) 0.0211 & 0.0583 \(\pm\) 0.0247 & - \\ \hline
**MnO\({}_{2}\)** & 0.1397 \(\pm\) 0.0175 & 0.1122 \(\pm\) 0.0206 & 0.28 \(\pm\) 0.0103 \\ \hline
**Fe\({}_{2}\)O\({}_{3}\)** & 7.8166 \(\pm\) 0.0166 & 7.5268 \(\pm\) 0.0257 & 4.6 \(\pm\) 0.0123 \\ \hline
**Cl** & 1.1126 \(\pm\) 0.1328 & 1.1000 \(\pm\) 0.1600 & 0 \\ \hline \hline \end{tabular}  
* The WDXRF data were obtained through EZ Scan analysis under vacuum conditions using powder samples. The pellets have been obtained from 1.5 g sample mixed with 2 g of BOROK from FLUXANA and covered with a 6 \(\mu\)m-thick Myfer foil during the analysis. The total scanning time for each sample was 30 min, allowing for a comprehensive assessment of the elemental composition of the pottery fragments. This analytical approach ensures the accuracy and reliability of the mineral composition data acquired through WDXRF, facilitating detailed investigations into the materials and production techniques employed in the creation of the pottery fragments.  
\end{table} 
Table 1: The composition of the pottery fragments obtained by using WDXRF (mass% \(\pm\) S.D.% normalized to 100%) *. concentrations of Fe, of about 7% in both samples, indicating a prevalent presence of iron in the ceramics. This insight into the elemental composition of the pottery shards from Dudesti facilitates a deeper understanding of the raw materials selected and the manufacturing techniques employed in crafting these Neolithic artifacts [18]. The findings from the WDXRF investigations revealed that calcium is not a major component in the investigated samples as a raw material, with only trace amounts found in a few samples in forms such as calcite, phosphate, or sulfate. These small concentrations of calcium could be provided by the clay and gypsum present in the geological formations of the areas where the sites are located. Moreover, gypsum could be identified in the plaster obtained by the clay processing, by the clay sprinkled with water until it has a cheesy appearance. The duration of fermentation depends on the properties of the clay and varies between a few days and a month. Often, the soil is left to ferment all winter [11]. The research provided insight into the raw materials used for product production and the chemical composition of the samples. Based on the results, it can be concluded that the samples are non-calcareous with a low limestone content, indicating the use of low-calcium clays in the ceramics manufacturing process. Additionally, the clay paste in the samples showed a consistent iron concentration of around 7%, highlighting the presence of iron in the composition of the ceramics [19; 20]. The high content of SiO\({}_{2}\), in all samples, is in accordance with the common abundance of quartz; it may be explained also by the use of natural hydraulic lime (for example, lime coming from marks or impure argillaceous limestones). Samples P1 and P2 present high silica contents.