Ferristrunzite

General Information:
 Chemical Formula:
Fe+++Fe+++2(PO4)2(OH)3·5(H2O)
 Composition:
(Molecular Weight = 516.60 gm)
Iron 32.43 % Fe
Phosphorus 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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