MnO2

H2O

Fe

Ca

Cu

Pb

K

Na

Mg

As + Zn + Co + Ni

EMD

93.0

5.0

0.004

0.03

0.0005

0. 0005

0.05

0.25

0.005

1.66

EMDW1

-

-

9.8

15.0

0.082

0.07

0.65

0.23

0.37

Unknown2

≈3%