General Information:
Chemical Formula:Fe+++2(PO4)(SO4)(OH)·6(H2O)
Composition:(Molecular Weight = 427.83 gm)Iron 26.11 %
FePhosphorus 7.24 %
P Hydrogen 3.06 %
H Sulfur 7.50 %
S Oxygen 56.10 %
O Empirical Formula: Fe3+2(SO4)(PO4)(OH)·6(H2O)
Locality:Ansbach, Thuringia, Germany.
Name Origin:From the Greek, diadochos, meaning "successor," presumably in allusion to its secondary origin.
Physical Properties: Cleavage:None
Color:yellow, brown, yellowish green, cinnamon brown, or yellowish white.
Density:2 - 2.4, Average = 2.2
Diaphaniety:Translucent to Opaque
Habits:Encrustations - Forms crust-like aggregates on matrix., Nodular - Tuberose forms having irregular protuberances over the surface., Stalactitic - Shaped like pendant columns as stalact ites or stalagmites (e.g. calcite).
Hardness:3-3.5 - Calcite-Copper Penny
Luster:Waxy
Streak:yellow
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