|
| TABLE 3 | ||||||||||||
| NIOBIUM AND TANTALUM MATERIALS IN NATIONAL DEFENSE STOCKPILE | ||||||||||||
| INVENTORIES AS OF DECEMBER 31, 2003�07 | ||||||||||||
| (Metric tons of niobium or tantalum content) | ||||||||||||
| 2007 | 2007 | Uncommitted | ||||||||||
| Stockpile | Disposal | Stockpile- | Non-stockpile- | 2007 | ||||||||
| Material1 | goal2 | authority | grade | grade | Total | Committed | ||||||
| Niobium: | ||||||||||||
| Concentrates | -- | -- | -- | -- | -- | -- | ||||||
| Carbide powder | -- | -- | -- | -- | -- | -- | ||||||
| Ferroniobium | -- | -- | -- | -- | -- | -- | ||||||
| Metal ingots | -- | 10.1 | 10.1 | -- | 10.1 | -- | ||||||
| Total | -- | 10.1 | 10.1 | -- | 10.1 | -- | ||||||
| Tantalum: | ||||||||||||
| Minerals | -- | -- | -- | -- | -- | -- | ||||||
| Carbide powder | -- | 1.73 | -- | -- | 1.73 | -- | ||||||
| Metal: | ||||||||||||
| Capacitor grade | -- | -- | -- | -- | -- | -- | ||||||
| Ingots | -- | -- | -- | -- | -- | -- | ||||||
| Oxide | -- | -- | -- | -- | -- | -- | ||||||
| Total | -- | 1.73 | -- | -- | 1.73 | -- | ||||||
| �-- Zero. | ||||||||||||
| 1National Defense Stockpile disposed of the remaining inventory of niobium concentrates, tantalum minerals, oxide, and�� | ||||||||||||
| capacitor grade metal in 2006; tantalum metal ingots in 2005; ferroniobium and niobium carbide in 2001.� | ||||||||||||
| 2Goal effective as of December 28, 2001. | ||||||||||||
| Source: Defense National Stockpile Center. | ||||||||||||
Source: United States Geological Survey Mineral Resources Program