Wavellite

Wavellite is a phosphate mineral, normally translucent green. It is found in fractures in aluminous metamorphic rock, in hydrothermal regions and in phosphate rock deposits. Named after William Wavell (?-1829) of England who discovered the mineral.Hydrated aluminum phosphate has the chemical formula;Al3(PO4)2(OH)3×5H2O
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(n.)
A hydrous phosphate of alumina, occurring usually in hemispherical radiated forms varying in color from white to yellow, green, or black.
  

General Information:
 Chemical Formula:
Al3(PO4)2(OH,F)3·5(H2O)
 Composition:
(Molecular Weight = 411.99 gm)
Aluminum 19.65 % Al
Phosphorus 15.04 % P 
Hydrogen 3.18 % H 
Oxygen 62.14 % O 
 Empirical Formula:
Al3(PO4)2(OH)3·5(H2O)
 Name Origin:
Named after William Wavell (?-1829) of England who discovered the mineral.
Physical Properties:
 Cleavage:
[110] Perfect, [101] Good
 Color:
blue, brown, brownish black, colorless, or green.
 Density:
2.3 - 2.4, Average = 2.34
 Diaphaniety:
Translucent
 Habits:
Stellate - Occurs as spherical, radial aggregates radiating from a "star" like point., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Stalact itic - Shaped like pendant columns as st
 Hardness:
3.5-4 - Copper Penny-Flourite
 Luminescence:
None.
 Luster:
Vitreous - Pearly
 Streak:
white
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