Table 3: XRF analysis of TW.

Component Concentration (%)

O27.409
Mg0.942
Al0.705
Si0.482
P4.806
S1.300
Cl1.418
K39.231
Ca21.804
Mn0.278
Fe0.717
Ni0.080
Cu0.101
Zn0.322
Br0.063
Rb0.214
Sr0.126