Romanèchite

	Romanèchite Romanèchite () is the primary constituent of psilomelane, which is a mixture of minerals. Most psilomelane is not pure romanechite, so it is incorrect to consider them synonyms. Romanèchite is a valuable ore of manganese, which is used in steelmaking and sodium battery production. It has a monoclinic crystal structure, a hardness of 6 and a specific gravity of 4.7-5. Romanèchite's structure consists of 2 × 3 tunnels formed by Mn oxide octahedra. It is associated with hematite, barite, pyrolusite, quartz and other manganese oxide minerals. It has been found in France, Germany, England, Brazil, India, and various parts of the United States, including Arizona, Virginia, Tennessee and Michigan Michigan () is a state in the Great Lakes region of the upper Midwestern United States. With a population of nearly 10.12 million and an area of nearly , Michigan is the 10th-largest state by population, the 11th-largest by area, and the ..., and sites throughout the Appalachian Va ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Oxide Minerals The oxide mineral class includes those minerals in which the oxide anion (O2−) is bonded to one or more metal alloys. The hydroxide-bearing minerals are typically included in the oxide class. The minerals with complex anion groups such as the silicates, sulfates, carbonates and phosphates are classed separately. Simple oxides: XO Periclase group Periclase Manganosite Zincite group Zincite * Bromellite *Tenorite Litharge Cuprite Ice * Hematite group Corundum Hematite Ilmenite Rutile group Rutile Pyrolusite * Cassiterite Baddeleyite Uraninite *Thorianite Spinel group Spinel Gahnite Magnetite Franklinite * Chromite Chrysoberyl Columbite Hydroxide subgroup: Brucite Manganite * Romanèchite Goethite group: Diaspore Goethite Nickel–Strunz Classification -04- Oxides IMA-CNMNC proposes a new hierarchical scheme (Mills et al., 2009). This list uses it to mod ... [...More Info...] [...Related Items...] OR:** [Wikipedia] [Google] [Baidu]
picture info	Marquette County, Michigan Marquette County ( ) is a county located in the Upper Peninsula of the U.S. state of Michigan. As of the 2020 Census, the population was 66,017. The county seat is Marquette. The county is named for Father Marquette, a Jesuit missionary. It was set off in 1843 and organized in 1851. Marquette County is the largest county in land area in Michigan, and the most populous county in the Upper Peninsula of Michigan. Marquette County comprises the Marquette, MI Micropolitan Statistical Area. Geography According to the United States Census Bureau, the county has a total area of , of which is land and (47%) is water. It is the largest county in Michigan by land area and fourth-largest by total area. The Huron Mountains are located in the county. To the north of the county is Lake Superior. Adjacent counties Alger County, east Delta County, southeast * Menominee County, south/CT Border Dickinson County, south/CT Border Iron County, southwest/CT Border Baraga County, west ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Manganese(III,IV) Minerals Manganese is a chemical element with the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese is a transition metal with a multifaceted array of industrial alloy uses, particularly in stainless steels. It improves strength, workability, and resistance to wear. Manganese oxide is used as an oxidising agent; as a rubber additive; and in glass making, fertilisers, and ceramics. Manganese sulfate can be used as a fungicide. Manganese is also an essential human dietary element, important in macronutrient metabolism, bone formation, and free radical defense systems. It is a critical component in dozens of proteins and enzymes. It is found mostly in the bones, but also the liver, kidneys, and brain. In the human brain, the manganese is bound to manganese metalloproteins, most notably glutamine synthetase in astrocytes. Manganese was first isolated in 1774. It is familiar in the laboratory in the form of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]