sample

S_BET (m²/g), R²

V_pores (cm³/g)

Pore diameter (nm)

Diatomite raw rock

27, R² = 0.9997

0.043

50

S1

47, R² = 0.9995

0.062

50

S2

31, R² = 0.9995

0.036

50

S3

25, R² = 0.9998

0.058

50