| Mineral | Ferri-katophorite |
|---|---|
| Formula | Na(CaNa)(Mg4Fe3+)(AlSi7O22)(OH)2 |
| Crystal Form | Monoclinic/Prismatic [2/m] |
| Cleavage | Perfect on {110}, intersecting at ~56 and ~124 degrees. |
| Color | Black, green-black, red-brown |
| Density | 3.2 – 3.5 g/cm3 |
| Diaphaneity | Transparent to translucent |
| Fracture | Brittle |
| Hardness | 5.0 - 6.0 |
| Lustre | Vitreous |
| Dana 8 Class | 66.1.3b.11 |
| Strunz Class | 8/F.09-30 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 299 |