Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 148

A weathered gadolinite (q.v.)—E₂O₃,2SiO₂. Cer = 6·6-8·2; Yttr = 43·4-46·5; ThO₂ = 10·8-12·8%.

Amorphous, massive.

G = 4·6. H = 5¹⁄₂. Green to brown; translucent.

Bluffton, Llano Co., Texas.