General Information:
Chemical Formula:(Fe++,Mg)2(PO4)(OH)
Composition:(Molecular Weight = 207.90 gm)Magnesium 5.85 %
MgIron 40.29 %
FePhosphorus 14.90 %
P Hydrogen 0.48 %
H Oxygen 38.48 %
O Empirical Formula: Fe2+1.5Mg0.5(PO4)(OH)
Environment:Found in phosphatic shales. Dimorph of wolfeite.
IMA Status:Approved IMA 1978
Locality:Big Fish River, NE YT, Canada.
Name Origin:Named for Jack Satterly (1906-), geologist at Ontario Department of Mines, Canada.
Physical Properties: Cleavage:None
Color:light brown or light yellow.
Density:3.68
Diaphaniety:Transparent
Habits:Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Aggregates - Made of numerous individual crystals or clusters., Nodular - Tuberose forms havin g irregular protuberances over the surfa
Hardness:4.5-5
Luster:Vitreous (Glassy)
Streak:light yellow
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