Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 134

E₂O₃,2SiO₂, with Fe´´´, Al, Mn´´´ traces; E = chiefly Sc. Yttr = 54·5%.

Orthorhombic, in radial aggregates.

G = 3·571. H = 6-7. Greyish green; translucent.

Iveland, Sätersdalen, Norway.