. "coltan"@en-us . "14672373-n"^^ . "0.256556"^^ . . "columbite-tantalite"@en-us . . "a valuable black mineral combining niobite and tantalite; used in cell phones and computer chips"@en-us . . "columbite-tantalite"^^ . "0.743444"^^ . "0.0"^^ . . . "0"^^ . . . "0"^^ . . "114672373"^^ . "0.0"^^ . . "0.0"^^ . "0.0"^^ . "0.0"^^ . "0.0"^^ . "113832951"@en-us .