Copiapite | |
Chemical Formula |
Fe2+Fe3+4(SO4)6(OH)2·20(H2O) |
Species |
Sulfates |
Crystal System |
Triclinic |
Mohs Scale |
2-3 |
Specific Gravity |
2.04-2.17 |
Color |
Sulfur-yellow to orange when crystalline, greenish-yellow to olive-green when massive |
Streak |
Not reported |
Luster |
Pearly, Earthy |
Refractive Index |
n = 1.506 - 1.540 n = 1.528 - 1.549 n = 1.575 - 1.600 |
Diaphaneity |
Transparent, Translucent, Opaque |
Cleavage |
Perfecton , perfect; on , imperfect. |
Fracture |
Irregular/Uneven, Micaceous |
Crystal Habit:Tabular pseudo-orthorhombic platy crystals, typically in scaly incrustations or granular pulverulent aggregates | |
Geological Setting:Areas of pyrite oxidation. |