johnstrupite
noun
john·strup·ite
ˈjänˌstrəˌpīt
plural -s
: a mineral approximately (Ca,Na)3(Ce,Ti,Zr)Si2O8F consisting of a complex silicate of cerium and other metals in prismatic crystals (specific gravity 3.29)
Word History
Etymology
German johnstrupit, from Frederik Johnstrup †1894 Danish mineralogist + German -it -ite