Satterlyite

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
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