|
| TABLE 3 | ||||||||||||
| NIOBIUM AND TANTALUM MATERIALS IN NATIONAL DEFENSE STOCKPILE | ||||||||||||
| INVENTORIES AS OF DECEMBER 31, 20061 | ||||||||||||
| (Metric tons of niobium or tantalum content) | ||||||||||||
| Uncommitted | ||||||||||||
| Stockpile | Disposal | Stockpile- | Non-stockpile- | |||||||||
| Material2 | goal | authority | grade | grade | Total | Committed | ||||||
| Niobium: | ||||||||||||
| Concentrates | -- | -- | -- | -- | -- | -- | ||||||
| Carbide powder | -- | -- | -- | -- | -- | -- | ||||||
| Ferroniobium | -- | -- | -- | -- | -- | -- | ||||||
| Metal ingots | -- | 22.2 | 22.2 | -- | 44.4 | -- | ||||||
| Total | -- | 22.2 | 22.2 | -- | 44.4 | -- | ||||||
| Tantalum: | ||||||||||||
| Minerals | -- | -- | -- | -- | -- | -- | ||||||
| Carbide powder | -- | 1.73 | -- | -- | 1.73 | -- | ||||||
| Metal: | ||||||||||||
| Capacitor grade | -- | -- | -- | -- | -- | -- | ||||||
| Ingots | -- | -- | -- | -- | -- | -- | ||||||
| Oxide | -- | -- | -- | -- | -- | -- | ||||||
| Total | -- | 1.73 | -- | -- | 1.73 | -- | ||||||
| -- Zero. | ||||||||||||
| 1Data may not add to totals shown because of independent rounding. | ||||||||||||
| 2National Defense Stockpile disposed of the remaining inventory of niobium-tantalum concentrates,� | ||||||||||||
| tantalum oxide and capacitor grade tantalum metal in 2005; tantalum metal ingots in 2004.� | ||||||||||||
| Source: Defense National Stockpile Center. | ||||||||||||
Source: United States Geological Survey Mineral Resources Program