Pb

Zn

Cu

Cd

Ni

As

Pb

1

Zn

0.547665

1

Cu

−0.162551

−0.361191

1

Cd

−0.043869

0.300717

−0.545404

1

Ni

0.173631

−0.057279

0.566508

−0.352250

1

As

−0.113648

−0.146662

−0.263423

0.230830

−0.065518

1