出典:Wiktionary
thortveitite (usually uncountable, 複数形 thortveitites)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/14 12:21 UTC 版)
Thortveitite is a mineral consisting of scandium yttrium silicate (Sc,Y)2Si2O7. It is the primary source of scandium. Occurrence is in granitic pegmatites. It was named after Olaus Thortveit, Norwegian engineer. It is greyish-green, black or grey in color.