The team discovered that each type of iron oxide exhibited varying degrees of catalytic activity for cleaving phosphorus from ...

The scientists proceeded to mix ferric nitrate with potassium hydroxide, creating a hard iron oxide mineral called nanocrystalline ferrihydrite, which occurs naturally in soil and water.

This oxygen combined with dissolved iron in the sea to form insoluble iron oxide, which sank to the sea floor. As it settled, sheets of red iron oxide were laid down between layers of silica-rich silt ...