Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 108

A titano-columbate of E and U; Yttr = 19·5-32·5; TiO₂ = 25-33%. Cer and ThO₂ traces. Isomorphous with Euxenite.

Orthorhombic.

G = 4·0-4·8. H = 6. Black; vitreous lustre.

Norway.