eck·er·mann·ite \ˈekə(r)məˌnīt\noun (-s) Etymology: Swedish eckermannit, from Claes W. H. von Eckermann b1886 Swedish professor + Swedish -it -ite : a mineral Na3(Mg,Li)4(Al,Fe)Si8O22(OH,F)2 consisting of an amphibole containing magnesium, lithium, iron, and some fluorine