Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 118

Hydrated yttria columbate. Yttr = 60·12%. A weathered Samarskite?

Amorphous, mamillary.

G = 3·313. H = 3¹⁄₂. White.

Mitchell Co., N. Carolina.