akermanite
noun
aker·man·ite
ˈō-kər-mə-ˌnīt,
ˈa-
plural -s
: a mineral Ca2MgSi2O7 that consists of calcium magnesium silicate and is an end-member of the melilite series
Word History
Etymology
German åkermanit, from Richard Åkerman, 19th century Swedish mineralogist + German -it -ite
First Known Use
1890, in the meaning defined above