General Information:
Chemical Formula:Co3(AsO4)2·8(H2O)
Composition:(Molecular Weight = 598.76 gm)Cobalt 29.53 %
CoArsenic 25.03 %
AsHydrogen 2.69 %
H Oxygen 42.75 %
O Empirical Formula: Co3(AsO4)2·8(H2O)
Name Origin:Named from the Greek, erythros for "red."
Physical Properties: Cleavage:[010] Perfect
Color:colorless, violet red, light pink, or purple red.
Density:3.06 - 3.18, Average = 3.12
Diaphaniety:Transparent to subtranslucent
Habits:Striated - Parallel lines on crystal surface or cleavage face., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Divergent - Crystals radiate from a center without producing stellar forms.
Hardness:1.5-2 - Talc-Gypsum
Luminescence:None.
Luster:Pearly
Streak:pinkish red
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