The Rare Earths: Their Occurrence, Chemistry, and Technology

by Stanley Isaac Levy

Tetragonal; probably a pseudomorph after Thorite.

G = 4·4-4·8. H = 2-3. Yellowish to orange-red.

Henderson Co., N. Carolina.

Baddeleyite.

ZrO₂, with small amounts of SiO₂, Fe₂O₃, Al₂O₃, CaO, etc. ZrO₂ = 96·5%.

Monoclinic.

G = 4·4-6·0. H = 6¹⁄₂. Brown; pleochroic.

São Paulo, Brazil; Rakwana, Ceylon.

Bagrationite.

A variety of Allanite (orthite) with no important chemical difference.