|
| TABLE 2 | ||||
| BORON MINERALS OF COMMERCIAL IMPORTANCE�� | ||||
| B2O3, | ||||
| Chemical | weight | |||
| Mineral1 | composition | percentage | ||
| Boracite (stassfurite) | Mg3B7O13Cl | 62.2 | ||
| Colemanite | Ca2B6O11�5H2O | 50.8 | ||
| Datolite | CaBSiO4OH | 24.9 | ||
| Hydroboracite | CaMgB6O11�6H2O | 50.5 | ||
| Kernite (rasortie) | Na2B4O7�4H2O | 51.0 | ||
| Priceite (pandermite) | CaB10O19�7H2O | 49.8 | ||
| Probertite (kramerite) | NaCaB3O9�5H2O | 49.6 | ||
| Sassolite (natural boric acid) | H3BO3 | 56.3 | ||
| Szaibelyite (ascharite) | MgBO2OH | 41.4 | ||
| Tincal (natural borax) | Na2B4O7�10H2O | 36.5 | ||
| Tincalconite (mohavite) | Na2B4O7�5H2O | 47.8 | ||
| Ulexite (boronatrocalcite) | NaCaB5O9�8H2O | 43.0 | ||
| 1Parentheses include common names. | ||||
Source: United States Geological Survey Mineral Resources Program