English word coltan comes from English columbite, English tantalite
| Dictionary entry | Language | Definition |
|---|---|---|
| columbite | English (eng) | (mineral) A black mineral that is a mixed iron and manganese niobate and tantalate, and is the main ore of niobium and tantalum. |
| tantalite | English (eng) | (mineralogy) A dark-brown mineral that is an ore of tantalum and niobium, of the chemical formula (Fe, Mn) Ta2O6. |
| coltan | English (eng) | A metallic ore from which the elements niobium and tantalum are extracted. |