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| TABLE 3 | ||||||||
| U.S. MAGNESIUM COMPOUNDS SHIPPED AND USED1 | ||||||||
| 2005 | 2006 | |||||||
| Quantity | Value | Quantity | Value | |||||
| (metric tons) | (thousands) | (metric tons) | (thousands) | |||||
| Caustic-calcined and specified (USP and technical) magnesias2 | 137,000 | $60,300 | 116,000 | $52,200 | ||||
| Magnesium hydroxide [100% Mg(OH)2]2 | 146,000 | r | 71,300 | r | 158,000 | 78,300 | ||
| Magnesium sulfate, anhydrous and hydrous | 51,700 | r | 16,700 | r | 48,000 | 12,200 | ||
| Refractory magnesia | W | W | W | W | ||||
| rRevised. W Withheld to avoid disclosing company proprietary data. | ||||||||
| 1Data are rounded to no more than three significant digits. | ||||||||
| 2Excludes material produced as an intermediate step in the manufacture of other magnesium compounds. | ||||||||
Source: United States Geological Survey Mineral Resources Program