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| Nickel (Ni) | |
|---|---|
| Name | Nickel |
| Atomic number | 28 |
| Atomic mass | 58.6934 |
| Group | 10 |
| Block | d-block |
| Appearance | Lustrous silvery-white metal |
| Electron configuration | [Ar] 3d8 4s2 |
| Oxidation states | +2, +3, +1, +4 (common: +2) |
| Density | 8.908 g/cm3 |
| Melting point | 1455 °C |
| Boiling point | 2730 °C |
Nickel (Ni) is a lustrous silvery-white transition metal with atomic number 28, known for its corrosion resistance, magnetic properties, and wide industrial use. It occurs in native form and in ores, plays roles in alloying and catalysis, and has notable health and environmental considerations. Nickel's economic and technological importance spans mining regions, metallurgical industries, and regulatory frameworks.
Nickel is a transition element that forms stable alloys and is notable in stainless steel, coinage, and electroplating processes. Major historical and contemporary actors in the nickel sector include mining companies such as Vale S.A., Norilsk Nickel, and Glencore, while major producing regions include Canada (Ontario), Russia (Norilsk), New Caledonia, and Australia (Western Australia). Research institutions like the Max Planck Society, National Institute of Standards and Technology, and universities such as Harvard University and University of Oxford contribute to materials science studies of nickel.
Nickel exhibits ferromagnetism at room temperature below its Curie point and shares electronic features investigated by groups at Bell Labs and the Cavendish Laboratory. Its crystalline structure is face-centered cubic, studied in publications from Lawrence Berkeley National Laboratory and the Brookhaven National Laboratory. Nickel's corrosion resistance underpins its use in Aerospace Corporation components and Siemens-type gas turbine alloys; properties such as hardness, ductility, and electrical conductivity are characterized in standards by organizations like ASTM International and the International Organization for Standardization. Nickel forms coordination complexes that appear in catalysts used by companies such as BASF and Johnson Matthey and in enzymatic models investigated at institutes including the Scripps Research Institute.
Nickel is found in laterite and magmatic sulfide deposits; notable deposit examples include the Sudbury Basin and the Norilsk–Talnakh district. Major mining operations are run by entities such as Vale S.A., Norilsk Nickel, and Glencore. Smelting and refining technologies developed by firms like Outotec and research from the Mining Industry Research Organisation handle ore-to-metal pathways. World trade patterns involve ports and markets in Shanghai, Rotterdam, and Singapore and are tracked by commodity firms such as London Metal Exchange and Metal Bulletin. Byproduct production comes from copper and platinum group metals operations; processing techniques include pyrometallurgy, hydrometallurgy, and pressure acid leaching as advanced at centers like CSIRO and Imperial College London.
Nickel is pivotal in producing stainless steel, superalloys for jet engine and gas turbine applications used by companies such as Rolls-Royce and General Electric. Electroplated nickel appears in coinage systems issued by national mints like the Royal Canadian Mint and the United States Mint; batteries employing nickel include NiMH and some lithium-ion chemistries developed by firms such as Panasonic and Tesla, Inc.. Catalysis roles are central in industrial chemistry performed by Shell and ExxonMobil for hydrogenation and reforming. Magnetic applications intersect with manufacturers like Siemens and research from MIT on electric motors for Toyota and BMW hybrid vehicles. Nickel-based alloys underpin chemical plant equipment regulated by bodies like American Society of Mechanical Engineers.
Nickel is an essential trace element for some microorganisms and plants, as investigated by laboratories at Wageningen University and University of Tokyo, where it functions in enzymes analogous to urease. In humans, nickel has limited recognized nutritional necessity; exposure issues are addressed by health agencies such as the World Health Organization, U.S. Environmental Protection Agency, and European Chemicals Agency. Occupational exposure in mines and refineries is regulated by standards from Occupational Safety and Health Administration and NIOSH, due to risks including contact dermatitis and carcinogenicity assessed by the International Agency for Research on Cancer. Clinical case reports from hospitals like Mayo Clinic document allergy management and implant-related hypersensitivity in prostheses from manufacturers such as Zimmer Biomet.
Nickel's ore confusion was chronicled by miners in the Saxony region and described in 18th-century writings; the name was popularized by the metallurgist Axel Fredrik Cronstedt who isolated the metal in 1751. Historical mining in regions such as Sudbury Basin and New Caledonia shaped industrial development and trade routes involving companies like Hudbay Minerals and colonial administrations including French colonial empire. Developments in electrochemistry at institutions like École Polytechnique and University of Göttingen enabled electroplating and battery applications later commercialized by firms such as Edison-era companies and modern corporates including Panasonic.
Environmental concerns around nickel include contaminant mobilization near mining districts like Norilsk and Sudbury Basin; remediation projects are supported by agencies such as United Nations Environment Programme and national ministries in Canada (Ontario) and Russia. Recycling efforts are promoted by corporations like Umicore and policy frameworks from the European Commission and United States Department of Energy, focusing on nickel recovery from stainless steel scrap, battery recycling programs by Redwood Materials, and urban mining initiatives led by research at Fraunhofer Society. Life-cycle analyses from IEA and academic groups at University of Cambridge assess energy inputs and greenhouse gas footprints for primary versus secondary nickel production.