Alchemy Series - Part I

In a forest near the Zolder race circuit a series of caches is hidden with an alchemy theme.
The idea is to find 8 elements. That can form alloys when combined by the two of them. So there will be 4 alloys caches. See the next picture.

Today we wanted to find the first 8 caches.

The first we found was (GC1HR1V-Alchemie - Koolstof) at 13:50.
The second was (GC1J6KY-Alchemie - Koper) at 14:15.
The third was (GC1J6H6-Alchemie - Natrium) at 14:35.
The fourth (GC1J6MA-Alchemie - Tin) at 14:50.
The fifth (GC1J6MF-Alchemie - Zink) 15:10.
With ths one we could make our first alloy combination and the result brought us the coordinates of (GC1JE1Z-Alchemie - Messing) that we logged at 15:45.
Then back to the first line of elements.

The sixth element (GC1J6KR-Alchemie - Chloor) logged at 16:40.
The seventh (GC1J6M5-Alchemie - Lood) at 17:00.
And the last one of the first line (GC1J6KX-Alchemie - IJzer) at 17:20.
And with this last one we succeeded in our goal for today.
Then we drove home and passed by (GC134QH-Co&Co: Allé, Sund och Gata?) that we found at 17:50.