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Alexander von Humboldt
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===Geological objects=== The mineral [[humboldtine]] was named for Alexander by [[Mariano Eduardo de Rivero y Ustariz|Mariano de Rivero]] in 1821.<ref>{{cite journal |last1=de Rivero |first1=Mariano |title=Note sur une combinaison de l'acide oxalique avec le fer trouvé à Kolowserux, près Belin en Bohéme |journal=Annales de Chimie et de Physique |date=1821 |volume=18 |pages=207–210}}</ref><ref>{{cite web |title=Humboldtine |url=https://www.mindat.org/min-1946.html |website=MinDat |access-date=15 September 2021}}</ref>
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