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What (who) is misch metal - definition
![[[Carl Auer von Welsbach]]](https://commons.wikimedia.org/wiki/Special:FilePath/Auer von Welsbach.jpg?width=200 "[[Carl Auer von Welsbach]]")
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3.svg?width=200 "Nb2Cl6(SMe2)3, featuring a metal–metal double bond.")
![Hexa(''tert''-butoxy)ditungsten(III)]], featuring a W–W triple bond.](https://commons.wikimedia.org/wiki/Special:FilePath/W2(OC(CH3)3)6.svg?width=200 "Hexa(''tert''-butoxy)ditungsten(III)]], featuring a W–W triple bond.")
![[[Chromium(II) acetate]], featuring a metal–metal quadruple bond.](https://commons.wikimedia.org/wiki/Special:FilePath/Cr2(OAc)4.svg?width=200 "[[Chromium(II) acetate]], featuring a metal–metal quadruple bond.")
![[Ru2(OAc)4Cl]n, where the metal–metal bond order is 2.5.](https://commons.wikimedia.org/wiki/Special:FilePath/Ru2(OAc)4Cl.svg?width=200 "[Ru2(OAc)4Cl]n, where the metal–metal bond order is 2.5.")
Wikipedia
Mischmetal (from German: Mischmetall – "mixed metal") is an alloy of rare-earth elements. It is also called cerium mischmetal, or rare-earth mischmetal. A typical composition includes approximately 55% cerium, 25% lanthanum, and 15~18% neodymium, with traces of other rare earth metals; it contains 95% lanthanides and 5% iron. Its most common use is in the pyrophoric ferrocerium "flint" ignition device of many lighters and torches, although an alloy of only rare-earth elements would be too soft to give good sparks. For this purpose, it is blended with iron oxide and magnesium oxide to form a harder material known as ferrocerium. In chemical formulae it is commonly abbreviated as Mm, e.g. MmNi5.
