Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 120
Rowlandite.
ОглавлениеSilicate of E, with Th, Ti, Fe, etc.—2Y₂O₃, 3SiO₂. Cer = 14·4; Yttr = 47·7; ThO₂ = 0·6%.
Massive.
G = 4·515. H = 6. Pale dull green.
Llano Co., Texas.