(ˈ)tȯ(r)t|vīˌtīt, (ˈ)thȯ- noun
( -s )
Etymology: German thortveitit, from Olaus Thortveit, 20th century Norwegian mineralogist + German -it -ite
: a mineral (Sc,Y) 2 Si 2 O 7 consisting of scandium yttrium silicate and occurring in slender grayish-green orthorhombic crystals (hardness 6-7, specific gravity 3.6)