1. This bed ranged from to thick and contained iron pyrite as well. 2. One of his most distinctive motifs-the cube-directly developed from his use of square-shaped iron pyrites . 3. However, it proved to be valueless iron pyrite and was eventually salvaged for road metalling. 4. This rarely encountered solid is structurally similar to that of iron pyrite ( FeS 2 ). 5. She was carrying iron pyrites and a general cargo and was bound for Leith and Hull. 6. Aznalcollar Mines, an iron pyrite mining company, used the lake to hold water laden with metal residues. 7. The iron pyrite then preserved the fossil. 8. There are indications that the " Iceman " called �tzi may have used iron pyrite to make fire. 9. The iron pyrites in the clay can heat up when exposed to the air and occasionally ignite the shales. 10. Iron pyrite was heaped up and allowed to weather ( an example of an early form of heap leaching ).
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