Element
Percentage by weight/unit / %
SiO
2
60.75
Al
2
O
3
24.15
Fe
2
O
3
2.51
CaO
1.56
MgO
2.54
Na
2
O
3.63
K
2
O
0.65
SiO
2
/Al
2
O
3
2.52
SiO
2
+ Al
2
O
3
84.90
LIO
5.21
LOI: Loss on ignition
Table 1:
XRF analysis of the clay-Na sample.
