Definition of eckermannite
: a mineral Na3(Mg,Li)4(Al,Fe)Si8O22(OH,F)2 consisting of an amphibole containing magnesium, lithium, iron, and some fluorine
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Origin and Etymology of eckermannite
Swedish eckermannit, from Claes W. H. von Eckermann, born 1886 Swedish professor + Swedish -it -ite
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