Mineral | Cronstedtite |
---|---|
Formula | Fe2+2Fe3+((Si,Fe3+)2O5)(OH)4 |
Crystal Form | Trigonal/Ditrigonal Pyramidal [3m] |
Cleavage | Perfect on {001} |
Color | Black, Dark brown-black, Green-black |
Density | 3.3 – 3.4 g/cm3 |
Diaphaneity | Translucent |
Hardness | 3.5 |
Lustre | Sub-metallic |
Streak | Dark olive green |
Type Loc. | Příbram, Central Bohemia Rgn., Bohemia, Czech Republic |
Dana 8 Class | 71.1.4.7 |
Strunz Class | 8/H.27-120 |
Mindat | mindat.org |
WebMineral | WebMineral |
ID | 321 |