| Mineral | Pyrochlore Group |
|---|---|
| Formula | A2Nb2(O,OH)6Z A is Na, Ca, Sn2+, Sr, Pb2+, Sb3+, Y, U4+, H2O or ◻ |
| Crystal Form | Isometric/Hexoctahedral [4/m 3 2/m] |
| Cleavage | Distinct/Good |
| Color | Brown, Yellow-brown, Reddish brown, Orange, Black |
| Density | 4.3 – 4.9 g/cm3 |
| Diaphaneity | Transparent |
| Fracture | Irregular/Uneven, Splintery, Sub-Conchoidal |
| Hardness | 5.0 - 5.5 |
| Lustre | Vitreous, Resinous |
| Streak | Light brown, Yellow-brown |
| Dana 8 Class | 8.2.1.1 |
| Strunz Class | 4/0.0- |
| Mindat | mindat.org |
| ID | 374 |