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It is not found as a free element in nature; it is often found in minerals in combination with iron.
Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels.
Historically, manganese is named for pyrolusite and other black minerals from the region of Magnesia in Greece, which also gave its name to magnesium and the iron ore magnetite.
By the mid-18th century, Swedish chemist Carl Wilhelm Scheele had used pyrolusite to produce chlorine.
Scheele and others were aware that pyrolusite (now known to be manganese dioxide) contained a new element, but they were unable to isolate it.
Johan Gottlieb Gahn was the first to isolate an impure sample of manganese metal in 1774, which he did by reducing the dioxide with carbon.
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Manganate (VI) salts can be produced by dissolving Mn compounds, such as manganese dioxide, in molten alkali while exposed to air.Especially through inhalation, it can cause manganism, a condition in mammals leading to neurological damage that is sometimes irreversible. All of the remaining radioactive isotopes have half-lives of less than three hours, and the majority of less than one minute.The primary decay mode before the most abundant stable isotope, Manganese isotopic contents are typically combined with chromium isotopic contents and have found application in isotope geology and radiometric dating.Would like to try a partner swap 3-way, orgy, webcam - whatever! We meet for a cocktail and prelimenary introductions and then, if all are agreed, exchange partners and then head to a club for some music and dancing! if your hot and horny check us out we might just be what you've been longing is very bi-curious can't wait to experience her lust for women, if couples join men will watch the first time then skies the limit.Watching each other, we soon become involved in an intense competition to see which couple can get hotter than the other. 34c shaved and luv most anything involving sex except potty games and pain. Husband is 6` 185 athletic and very good with his equipment :-) I am very interested in ff encounters but will not turn down a stiff cock :-) I am looking for couples or single females to play. Looking for couples with well hung males for swapping or same room play or 3way if your wife is bi. cum be with us we are lookin for single women or couples, for discreet sexual relations. must be hot horny and up for anything, and between the ages of 18-40.
The male magnes attracted iron, and was the iron ore now known as lodestone or magnetite, and which probably gave us the term magnet.