| Mineral | Kröhnkite |
|---|---|
| Formula | Na2Cu(SO4)2 • 2(H2O) |
| Crystal Form | Monoclinic/Prismatic [2/m] |
| Cleavage | {010} perfect, {1¯01} very imperfect |
| Color | Blue, Greenish-blue; Light blue to Colorless in transmitted light |
| Density | 2.9 g/cm3 |
| Diaphaneity | Transparent to Translucent |
| Fracture | Conchoidal |
| Hardness | 2.5 - 3.0 |
| Lustre | Vitreous |
| Streak | White |
| Dana 8 Class | 29.3.2.1 |
| Strunz Class | VI/C.16-10 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 127 |