Wavellite
Chemical Formula	Al3(PO4)2(OH,F)3·5H2O
Species	Phosphates
Crystal System	Orthorhombic
Mohs Scale	3-4
Specific Gravity	2.36
Color	Green to yellowish-green and yellow, brown, white and colorless
Streak	White
Luster	Vitreous, Greasy, Pearly
Refractive Index	n = 1.518 - 1.535 n = 1.524 - 1.543 n = 1.544 - 1.561
Diaphaneity	Transparent, Translucent
Cleavage	PerfectPerfect on , good on , distinct on .
Fracture	Irregular/Uneven, Sub-Conchoidal
Crystal Habit：Spherical, radial aggregates; striated prisms; crusty to stalactitic
Geological Setting：A secondary mineral of aluminous low-grade metamorphic rocks, in phosphate and limonitic deposits; more rarely as a late-forming hydrothermal vein mineral.