bröggerite
noun
brög·ger·ite
ˈbrəgəˌrīt
plural -s
: a thorium-bearing variety of uraninite (U,Th)O2 occurring in octahedral crystals (specific gravity 9.03)
Word History
Etymology
Swedish bröggerit, from W. C. Brögger †1940 Norwegian mineralogist + Swedish -it -ite