Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 32

Titanium dioxide, TiO₂ = 99-100%; trimorphous with Anatase and Rutile.

Orthorhombic.

G = 3·87-4·01. H = 5¹⁄₂-6. Brown; opaque.

Dauphiné; Urals; Switzerland; Magnet Cove, Arkansas.