Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 103

E₂CaF₂(CO₃)₃. Cer = 50·8-64·4; Yttr = 0-2·5%.

Hexagonal. Habit pyramidal.

G = 4·36. H = 4¹⁄₂. Yellow to red; transparent.

Muso Valley, Columbia; Montana, U.S.A.; Greenland; Norway; the Urals, etc.