General Information:
Chemical Formula:
Fe+++2(PO4)(SO4)(OH)·6(H2O)
Composition:
(Molecular Weight = 427.83 gm)
Iron 26.11 % Fe
Phosphorus 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
More details...