ˈekə(r)məˌnīt noun
( -s )
Etymology: Swedish eckermannit, from Claes W. H. von Eckermann b 1886 Swedish professor + Swedish -it -ite
: a mineral Na 3 (Mg,Li) 4 (Al,Fe)Si 8 O 22 (OH,F) 2 consisting of an amphibole containing magnesium, lithium, iron, and some fluorine