plagionite
noun
pla·gi·o·nite
ˈplājēəˌnīt
plural -s
: a mineral Pb5Sb8S17 consisting of a lead antimony sulfide of a blackish lead-gray color and metallic luster (specific gravity 5.4)
Word History
Etymology
German plagionit, from Greek plagion, neuter of plagios oblique + German -it -ite