Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 146

Silicate and columbate of Ca, Zr, Na; Si₁₀Zr₃Cb₂O₄₂F₃Ca₁₀Na₅? ZrO₂ = 15·2-22·7%. Cer, traces.

Monoclinic; prismatic or tabular habit.

G = 3·41-3·44. H = = 5¹⁄₂-6. Light yellow; pleochroic.

Langesund Fiord.