Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 149

Ca₃E₂F₁₂, 1¹⁄₂H₂O. Cer = 9·3-18·2; Yttr = 8·1-29·4%.

Massive, granular.

G = 3·45. H = 4¹⁄₂. White to violet blue or brown.

Various localities in Scandinavia.