oxidation of pyrite in coal to magnetite

Iron pyrite - The Full Wiki- oxidation of pyrite in coal to magnetite ,2.5–3 to a magnetic ... this cycle continues until the pyrite is depleted. Iron pyrite oxidation ... Colliery and surface hazards through coal-pyrite oxidation ...Magnetite - WikipediaMagnetite is a rock mineral and one of the ... a range of oxidizing conditions are found in magmas and the oxidation state helps to determine how the magmas might ...