Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 78

A variety of Perovskite (q.v.) containing E and Fe. Cer = 4-7; TiO₂ = 55%.

Pseudo-cubic.

G = 4·2. H = 5¹⁄₂. Grey; opaque; lustre metallic.

Alnö, Sweden.