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Table 7 Descriptive statistics of massic elemental concentrations of U, Th and K for all the analyzed clay samples

From: Determination of radionuclides and elemental composition of clay soils by gamma- and X-ray spectrometry

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