eckermannite
noun
eck·er·mann·ite
ˈekə(r)məˌnīt
plural -s
: a mineral Na3(Mg,Li)4(Al,Fe)Si8O22(OH,F)2 consisting of an amphibole containing magnesium, lithium, iron, and some fluorine
Word History
Etymology
Swedish eckermannit, from Claes W. H. von Eckermann, born 1886 Swedish professor + Swedish -it -ite