ilsemannite
noun
il·se·mann·ite
ˈil(t)səməˌnīt,
ˈilzə-
plural -s
: a mineral Mo3O8·nH2O(?) consisting of black, blue-black, or blue earthy massive hydrous oxide or perhaps sulfate of molybdenum
Word History
Etymology
German ilsemannit, from J. C. Ilsemann †1822 German mining commissioner + German -it -ite