a black mineral that is an ore of niobium and tantalum
例句
We have interest to buy tantalite, Ta2O5, coltan, columbite in Uganda and East African region. 我们有意在乌干达和东非地区购买钽铁矿、五氧化二钽、钽矿石、钶铁矿。
On the basis of detailed studies on columbite from the Suzhou granite, tantalite has been found for the first time in this granite. 本文在研究苏州花岗岩中铌铁矿的基础上,首次在该地区发现了钽铁矿。
The results showed that dielectric constant decreased ,the loss increased because of pyrochlore phase and it was pretented effectively by columbite precursor routes. 研究发现,焦绿石相的存在造成了低介电常数、高损耗;
at one time, Nigeria was the world's largest exporter of columbite. 尼一度曾是世界上最大的钶铁矿出口国。
