Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 52

A phosphosilicate of E, Ca, Al, K and Na, with ThO₂, H₂O, etc. Cer = 40·5; ThO₂ = 3·3%.

Orthorhombic.

G = 3·473. H = 5¹⁄₂-6. Brown; opaque.

Julianehaab, Greenland.