APPLICATIONS: | Minor ore of nickel and mineral specimens. |
ASSOCIATED MINERALS: | Niccolite, skutterudite, gersdorffite and erythrite. |
CHEMICAL STRUCTURE: | Ni3(AsO4)2-8(H2O), Hydrated Nickel Arsenate. |
CLASS: | Phosphates. |
CLEAVAGE: | Perfect in one direction. |
COLOR: | Bright apple green to pale green or gray in massive and thin crust forms. |
CRYSTRAL HABITS: | Flattened striated blades or radiating accicular crystals, but large crystals are extremely rare. More commonly as crusts or powdery masses. |
CRYSTAL SYSTEM: | Monoclinic, 2/m. |
FIELD INDICATORS: | Color, softness, associations and flexible crystals. |
FRACTURE: | Flaky. |
GENERAL INFORMATION: | Thin flakes are flexible. |
GEOGRAPHY: | Cobalt, Ontario; Lavrion, Greece; Humboldt, Nevada, USA; Sierra Cabrera, Spain and Germany. |
GROUP: | Vivianite. |
HARDNESS: | 1.5 - 2.5. |
LUSTER: | Vitreous to adamantine to dull in massive or powdered forms. |
TRANSPARENCY: | Transparent to translucent. |
SPECIFIC GRAVITY: | 3.0 - 3.1. |
STREAK: | Pale green or gray within gray specimens. |
