Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 26

A Titano-silicate of barium, BaTiSi₃O₉. TiO₂ = 20·1%.

Rhombohedral.

H = 6¹⁄₂-7. Colourless to blue; transparent; pleochroism strong.

Source of San Benito River, California.