Iron Phosphate
Fe3(PO4)2 * 8H2O
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Chemical name
Iron Phosphate |
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Mineral name
Vivianite |
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Chemical formula
Fe3(PO4)2 * 8H2O |
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Melting point [°C]
1114 |
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Crystal system
monoclinic |
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Crystal Class
Prismatic (2/m) |
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Space Group
B2/m |
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Unit cell
a [Å]:10.086 b [Å]:13.441 c [Å]:4.703 |
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Molecular weight [g/mol]
501.61 |
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Formula units
Z=2 |
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Mohs hardness
1.5 - 2 |
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Density [g/cm3]
2.68 |
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Cleavage
perfect on {010} |
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Color
pale green |
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Transparency
transparent to translucent |
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Optical character
biaxial (+) |
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Refractive Index
nα=1.579-1.616; nβ=1.602-1.656; nΥ=1.629-1.675 |
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Birefringence δ
0.050 - 0.059 |
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Pleochroism δ
visible; X=blue, deep blue, indigo-blue; Y=pale yellowish green, pale bluish green, yellow-green; Z=pale yellowish green, olive-yellow |
