1. When the wetlands are drained the iron pyrites in the soil are exposed to air and form sulphur acid.

2. A thick, square, iron pyrite mirror, inlaid with stucco plaques, was placed next to the female's right knee.

3. A kinetic property of acidulation process of waste product of iron pyrite is studied, kinetic data of acidulation process are measured.

4. This paper involved chemical compositions and physical phases of iron pyrite cinder and the principle of extracting iron from the cinder acid leaching.

5. To that end, Wadia and his colleagues found that iron pyrite—better known as fool's gold—was several orders of magnitude better than any of the alternatives, based on both cost and abundance.