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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.

Wavellite is a phosphate mineral with formula Al₃(PO₄)₂(OH, F)₃·5H₂O. It normally occurs as translucent green radial or spherical clusters.

Discovery and occurrence

It was first described in 1805 for an occurrence within the High Down Quarry, Filleigh, Devon, England and named for William Wavell (?-1829) of England who discovered the mineral.

It occurs in association with crandallite and variscite in fractures in aluminous metamorphic rock, in hydrothermal regions and in phosphate rock deposits. It is found in a wide variety of locations notably in the Mount Ida, Arkansas area in the Ouachita Mountains.