General Information:
Chemical Formula:
(Fe++,Mg)2(PO4)(OH)
Composition:
(Molecular Weight = 207.90 gm)
Magnesium 5.85 % Mg
Iron 40.29 % Fe
Phosphorus 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
More details...