LithoCat

MineralVivianite
FormulaFe2+3(PO4)2 • 8(H2O)  
Crystal FormMonoclinic/Prismatic [2/m]
Cleavage[010] Perfect
ColorColorless, Green, Blue, Dark green, Dark bluish green
Density2.6 – 2.7 g/cm3
DiaphaneityTransparent to Translucent to Op
FractureSectile
Hardness1.5 - 2.0
LustreVitreous - Pearly
StreakBluish white
Dana 8 Class40.3.6.1
Strunz ClassVII/C.13-40
Mindatmindat.org
WebMineralWebMineral
ID76