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Manganese is a chemical element with the symbol Mn and atomic number of 25. It is found as the free element in nature (often in combination with iron), and in many minerals. The free element is a metal with important industrial metal alloy uses. Manganese ions are variously colored, and are used industrially as pigments and as
Output from Kazakhstan's mineral and natural resources sector for 2004 accounted for 74.1% of the value of industrial production, of which 43.1% came from the oil and gas condensate extraction. In 2004, the mineral extraction sector accounted for 32% of the GDP, employed 191,000 employees, and accounted for 33.1% of capital investment and 64.5% ...
Manganese [14] South Africa China: List of countries by manganese production: Mercury [15] China Mexico: List of countries by mercury production: Nickel [16] Indonesia Philippines: List of countries by nickel production: Niobium [17] Brazil Canada: List of countries by niobium production: Palladium [18] Russia South Africa
The high natural abundance of nickel, copper, cobalt, zinc, iron, and manganese in ferromanganese nodules has promoted research into their use as a rare metal resource. The Clarion–Clipperton zone in the northeastern Pacific Ocean has been observed as an area containing the highest concentration of resource-grade nodules. [ 4 ]
Manganese is a silvery-gray metal that resembles iron. It is hard and very brittle, difficult to fuse, but easy to oxidize. [11] Manganese and its common ions are paramagnetic. [12] Manganese tarnishes slowly in air and oxidizes ("rusts") like iron in water containing dissolved oxygen. [13]
The name Kuruman is derived from the Chief who lived in the area, named Kudumane. Robert Moffat , a missionary from the London Missionary Society , also lived there from 1820 to 1870. Moffat helped build the Moffat Church which was completed in 1838 and is still used for regular church services.
Pyrolusite is a mineral consisting essentially of manganese dioxide (Mn O 2) and is important as an ore of manganese. [7] It is a black, amorphous appearing mineral, often with a granular, fibrous, or columnar structure, sometimes forming reniform crusts. It has a metallic luster, a black or bluish-black streak, and readily soils the fingers.
Organomanganese chemistry is the chemistry of organometallic compounds containing a carbon to manganese chemical bond.In a 2009 review, Cahiez et al. argued that as manganese is cheap and benign (only iron performs better in these aspects), organomanganese compounds have potential as chemical reagents, although currently they are not widely used as such despite extensive research.