General Information:
Chemical Formula:Fe+++Fe+++2(PO4)2(OH)3·5(H2O)
Composition:(Molecular Weight = 516.60 gm)Iron 32.43 %
FePhosphorus 11.99 %
P Hydrogen 2.93 %
H Oxygen 52.65 %
O Empirical Formula: Fe3+Fe3+2(PO4)2(OH)3·6(H2O)
Environment:Secondary phosphate mineral.
IMA Status:Approved IMA
Locality:Blaton, Belgium.
Name Origin:Named for its composition and for Hugo Strunz (1910-), mineralogist, Berlin, who authored the Strunz system of mineral classification.
Physical Properties: Cleavage:[???] Good
Color:brownish yellow or light yellow.
Density:2.38 - 2.5, Average = 2.44
Diaphaniety:Translucent
Habits:Acicular - Occurs as needle-like crystals., Aggregates - Made of numerous individual crystals or clusters.,
Hardness:4 - Fluorite
Luster:Vitreous (Glassy)
Streak:light yellow
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