Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 45
Davidite.
ОглавлениеA Titanate of Fe, U, V, Cr, and E—uncertain formula. TiO₂ > 50; E₂O₃ = 5-10%.
Cubic—in grains and rounded crystals.
G = 4 about. Black, with brilliant lustre.
Olary, S. Australia.