Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 21

3ThO₂,[3SiO₂,P₂O₅]6H₂O; traces of Fe, Ca, Mg, Al, CO₂, etc. SiO₂ replaced by P₂O₅3? ThO₂ = 69·2-72·2%.

Tetragonal; probably a pseudomorph after Thorite.

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

Henderson Co., N. Carolina.