a black mineral that is an ore of niobium and tantalum
例句
The selective depression performance of four type depressants for niobite and do lomite is described. 考查4种抑制剂对铌铁矿及白云石的选择性抑制性能。
The fine spar contains 40 % tantalum while the tantalum niobite contains 21% tantalum. 细晶石中的钽的含量占40%25，而钽铌铁矿中的钽含量占21%25。
Study on Depression about Niobite and Dolomite 铌铁矿及白云石的抑制作用研究
a hard gray lustrous metallic element that is highly corrosion-resistant; occurs in niobite and fergusonite and tantalite. 一种坚硬有光泽的灰色金属元素，抗腐蚀性极强，见于铌铁矿、褐钇铌矿和钽铁矿中。
a soft gray ductile metallic element used in alloys; occurs in niobite; formerly called columbium. 一种灰色金属元素，软质，易延展，用于合金中，见于铌铁矿，以前称作钶。
