Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 69
Homilite.
Оглавление(Ca,Fe)₃(BO)₂(SiO₄)₂. Sometimes with ceria earths, 0-2·6%.
Monoclinic—isomorphous with Gadolinite (? Brögger).
G = 3·34-3·38. H = 41⁄2-5. Black; pleochroic.
Islands of Lanegsund Fiord, Norway.
