General Information:
Chemical Formula:
Fe++Fe+++2(PO4)2(OH)2·6(H2O)
Composition:
(Molecular Weight = 499.59 gm)
Iron 33.54 % Fe
Phosphorus 12.40 % P
Hydrogen 2.82 % H
Oxygen 51.24 % O
Empirical Formula:
Fe2+Fe3+2(PO4)2(OH)2·6(H2O)
Environment:
Secondary mineral in sedimentary rocks replacing rockbridgeite.
IMA Status:
Approved IMA
Locality:
Mullica Hill, New Jersey, USA.
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:
yellow brown, light brown, or colorless.
Density:
2.5
Diaphaniety:
Translucent
Habits:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Acicular - Occurs as needle-like crystals., Fibrous - Crystals made up of fibers.
Hardness:
4 - Fluorite
Luster:
Vitreous (Glassy)
Streak:
light brown
More details...