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Brookite (TiO2) NS1822 |
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| Crystal system | orthorhombic. |
| Habit | tabular or lamellar crystals. |
| Cleavage | indistinct or in traces. |
| Fracture | subconchoidal to uneven. |
| Hardness | 5.5-6 |
| Specific Gravity | 4.1 |
| Color | brown to black and sometimes banded. |
| Luster | transparent to opaque with an adamantine to submetallic luster. |
| Streak | white, light yellow or light gray. |
| Distinguishing features | this mineral is distinguished from its cousin anatase by its habit, banding and streak. |
| Uses | a source of titanium. |
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