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 |