thortveitite

== English == === Etymology === From Thortveit +‎ -ite, after Norwegian engineer Olaus Thortveit. === Noun === thortveitite (usually uncountable, plural thortveitites) (mineralogy) A scandium yttrium silicate mineral, greyish-green, black or grey in colour, the primary source of scandium. === Further reading === David Barthelmy (1997–2026), “Thortveitite”, in Webmineral Mineralogy Database. “thortveitite”, in Mindat.org‎[1], Hudson Institute of Mineralogy, 2000–2026.