Composition ratio

Chemical analysis

LIBS standard deviation (%)

No correction

(IMg1/IMg2: 4 - 24)

Corrected

(IMg1/IMg2: 4 - 24)

Corrected

(IMg1/IMg2: 4 - 8)

Corrected

(IMg1/IMg2: 12 - 24)

C/SiO2

0.383

34

17

11

17

Al2O3/SiO2

0.558

48

20

4.9

14

Fe2O3/SiO2

0.137

27

8.9

3.7

9.3

CaO/SiO2

0.017

44

27

10

22