摘要
Ⅰ. INTRODUCTION H(?)gbomite, a titanium-bearing oxide mineral, is rare in nature, In structure, it is similar to spinel, especially to nigerite and taaffeite. A. S. Povarenneih includes nigerite, taaffeite and h(?)gbomite in the same group as an isostrueture. After it was first reported by Gavellin in 1917, h(?)gbomite has been found in Tanzania, Kamailong and Zam-
