The Rare Earths: Their Occurrence, Chemistry, and Technology

by Stanley Isaac Levy

Amorphous, mamillary.

G = 3·313. H = 3¹⁄₂. White.

Mitchell Co., N. Carolina.

Rosenbuschite.

Titanosilicate of Ca, Zr, Na, E, Fe, Mn, with F. ZrO₂ = 18·7-20; Cer = 0·3-2·4%.

Monoclinic, in spherical aggregates.

G = 3·30-3·31. H = 5-6. Orange-grey.

Near Brevik, Sweden.

Rowlandite.

Silicate of E, with Th, Ti, Fe, etc.—2Y₂O₃, 3SiO₂. Cer = 14·4; Yttr = 47·7; ThO₂ = 0·6%.