Element | Cu | Fe | Mn | Zn |
Cu | 1 | 0.818* | 0.806* | 0.670 |
Fe | 0.818* | 1 | 0.630 | 0.712 |
Mn | 0.806* | 0.630 | 1 | 0.352 |
Zn | 0.670 | 0.712 | 0.352 | 1 |