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Limonite is an ore consisting in a mixture of hydrated iron III oxide-hydroxide of varying composition. The generic formula is frequently written as FeO OH nH2O, although this is not entirely accurate as limonite often contains a varying amount of oxide compared to hydroxide.
Together with hematite, it has been mined as ore for the production of iron. Limonite is heavy and yellowish-brown. It is a very common amorphous substance though can be tricky to find when mined with hematite and bog ore. It is never crystallized into macroscopic crystals, but may have a fibrous or microcrystalline structure, and commonly occurs in concretionary forms or in compact and earthy masses sometimes mammillary, botryoidal, reniform or stalactitic. The colour presents various shades of brown and yellow, and the streak is always brownish, a character which distinguishes it from hematite with a red, or from magnetite with a black streak. It is sometimes called brown hematite or brown iron ore.It is not a true mineral and it is composed by a mixture of similar hydrated iron oxide minerals, mostly goethite with lepidocrocite, jarosite, and others. Limonite forms mostly in or near oxidized iron and other metal ore deposits and as sedimentary beds. Limonite may occur as the cementing material in iron rich sandstones. Also known as the Lemon Rock.
Limonite has been known to form pseudomorphs after other minerals such as pyrite, meaning that the chemical weathering transforms the crystal of pyrite into limonite but keeps the external shape of the pyrite crystal. It has also been formed from other iron oxides, hematite and magnetite the carbonate siderite and iron rich silicates like some garnets.It is named from the Greek word for meadow , in allusion to its occurrence as "bog-ore" in meadows and marshes.
Other mineral category:
1. Beneficiation process of magnetite ore
2. Beneficiation of hematite iron ore
3. Beneficiation process of tungsten ore
4. Beneficiation process of molybdenum ore
5. Beneficiation process of mirror iron ore
6. Beneficiation process of manganese ore
7. Beneficiation process of Lead Zinc(Zn) Ore
8. Beneficiation process of gold ore
9. Beneficiation process of Fluorite ore
10. Beneficiation process of copper ore
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