God for us to design products, we are the porters of nature!
| Vivianite | |
Chemical Formula |
Fe3(PO4)2?8(H2O) |
Species |
Phosphates |
Crystal System |
Monoclinic |
Mohs Scale |
1-2 |
Specific Gravity |
2.68 |
Color |
Colorless, very pale green, becoming dark blue, dark greenish blue, indigo-blue, then black with oxidation |
Streak |
White, altering to dark blue, brown |
Luster |
Vitreous, Pearly, Dull |
Refractive Index |
n = 1.579 - 1.616 n = 1.602 - 1.656 n = 1.629 - 1.675 |
Diaphaneity |
Transparent, Translucent |
Cleavage |
PerfectPerfect on , in traces on and . |
Fracture |
Fibrous |
| Crystal Habit：Flattened, elongated prismatic crystals, may be rounded or corroded; as stellate groups, incrustations, concretionary, earthy or powdery | |
| Geological Setting：A secondary mineral found in a number of geologic environments: The oxidation zone of metal ore deposits, particularly associated with gossan; in granite pegmatites containing phosphate minerals; and in clays and glauconitic sediments, and in recent alluvial deposits replacing organic material, peat, lignite, bog iron ores and forest soils. | |
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