| 单词 | columbite-tantalite |
| 释义 | columbite-tantalite (once / 5909656 pages) n WORD FAMILY columbite-tantalite USAGE EXAMPLESThe minerals are gold, cassiterite, wolframite and columbite-tantalite, also called coltan. New York Times(Aug 22, 2012) How the SEC is monitoring electronics companies use of cassiterite, columbite-tantalite and wolframite. New York Times(Dec 19, 2011) It is also an important source of columbite-tantalite, the mineral known as coltan that is used in mobile phones and computers. BusinessWeek(Dec 07, 2011) n a valuable black mineral combining niobite and tantalite; used in cell phones and computer chips Syn|Hyper coltan mineral solid homogeneous inorganic substances occurring in nature having a definite chemical composition |
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