21. Submicron-sized goethite [ FeO ( OH ) ] is yellow; coarse goethite is brown. 22. Submicron-sized goethite [ FeO ( OH ) ] is yellow; coarse goethite is brown. 23. Although they have the same chemical formula as goethite , their different crystalline structures make them distinct minerals. 24. The evidence included sulfates and the minerals goethite and carbonates which only form in the presence of water. 25. The evidence included sulfates and the minerals goethite and carbonates that only form in the presence of water. 26. It occurs in association with basaluminite, gibbsite, epsomite, gypsum, celestine, dolomite and goethite . 27. This allows for goethite to grow within the olivine making the close packed planes common for both structures. 28. In general, bog ores consist primarily of iron oxyhydroxides, commonly goethite ( FeO ( OH ) ). 29. This iron ore was previously mined between 1967 and 1974, and consists of haematite with some goethite and limonite. 30. All the nickel in the silicate zone is leached downwards ( absolute nickel concentration ) from the overlying goethite zone.
