Bog-Iron Ore

Brown hematite, limonite, 2Fe2O3.3H,O. An uncrystallized hydrous oxide, or mixture of several hydrous oxides, of iron, formed by the action of water in low, marshy spots. When pure, it contains 59.5 per cent iron, usually 15 per cent le . It is used as an iron ore; but yields cold-short iron, due to presence of phosphorus.