| 41. | Common impurities include magnesium, aluminium, calcium, zirconium, niobium, and tantalum.
|
| 42. | Charles Hatchett ( 1765 1847 ), discoverer of niobium, is also buried here.
|
| 43. | :It's the primary ore of " columbium ", now called niobium.
|
| 44. | It contains four relatively uncommon elements : antimony, niobium, tantalum, and tungsten.
|
| 45. | Both types use niobium pentoxide ( Nb 2 O 5 ) as the dielectric layer.
|
| 46. | In niobium electrolytic capacitors the dielectric is niobium pentoxide ( Nb 2 O 5 ).
|
| 47. | In niobium electrolytic capacitors the dielectric is niobium pentoxide ( Nb 2 O 5 ).
|
| 48. | If successful the Panda Hill niobium deposit will be the first niobium mine in Africa.
|
| 49. | If successful the Panda Hill niobium deposit will be the first niobium mine in Africa.
|
| 50. | They were accused of illegally exporting large quantities of niobium, tantalum, indium and germanium.
|
