Table 7.
Descriptive statistics of massic elemental concentrations of U, Th and K for all the analyzed clay samples
| Parameter | Massic elemental concentration | ||
|---|---|---|---|
| U (ppm) | Th (ppm) | K (%) | |
| Mean | 2.7212 | 4.9229 | 0.6716 |
| Standard deviation | 0.96973 | 1.40750 | 0.42847 |
| Maximum | 4.11 | 8.20 | 1.63 |
| Minimum | 1.17 | 2.73 | 0.09 |
| Median | 2.6215 | 4.5394 | 0.6670 |
| Skewness | −0.005 | 0.564 | 0.518 |
| Kurtosis | −1.366 | −0.384 | −0.596 |