Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 48

Approximately 6RTiO₃,R(Cb,Ta)₂O₆, where R = Ca, Fe´´. Believed by Hauser to be merely an impure Perovskite (q.v.). Cer = 0-5·1; TiO₂ = 41·5-59·3%.

Cubic.

G = 4·13. H = 5-6. Black; opaque.

Vogtsburg, near Baden, Germany.