yttrotantalite

yttrotantalite

[‚i·trə′tant·əl‚īt]
(mineralogy)
(Y,U,Fe)(Ta,Nb)O4 A black or brown, orthorhombic mineral consisting of an oxide of iron, yttrium, uranium, columbium, and tantalum; occurs in prismatic and tabular form.
References in periodicals archive ?
Although at first predominantly if not exclusively British minerals, Wright's exchange boxes soon began to include obvious foreign material (foreign to England that is!): in 1849 he sent such things as yttrotantalite (then only known from Sweden) and euchroite (only known from Libethen, Hungary), and in 1852 Wright asked Jefferis if he wanted Norwegian material: "I have purchased 40 boxes." The two men exchanged specimens for several years, sometimes sending nearly 200 at a time, but the flow of minerals seems to have faltered towards the end of the 1850s.
The Cooglegong area, possibly the Trigg Hill pegmatites, is the type locality for formanite and tanteuxenite and is also known for its yttrotantalite, fergusonite and gadolinite.