man·ga·nite
| \ ˈmaŋ-gə-ˌnīt
\
\
Definition of manganite
1
: a metallic gray to black mineral MnO(OH) that is a hydroxide and minor ore of manganese
2
: any of various unstable salts made by reaction of manganese dioxide with a base
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“Manganite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/manganite. Accessed 10 Apr. 2021.
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The first known use of manganite was in 1827
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